openapi: 3.2.0
info:
  contact:
    name: US Geological Survey - Water Data for the Nation
    url: https://waterdata.usgs.gov
    x-ogc-serviceContact:
      addresses: []
      emails:
      - value: wdfn@usgs.gov
      hoursOfService: pointOfContact
      links:
      - href: https://waterdata.usgs.gov/questions-comments/?referrerUrl=https://api.waterdata.usgs.gov
        type: text/html
      name: WDFN Support
  description: 'The United States Geological Survey (USGS) collects water data at monitoring locations across the United States using both automated sensors and manual data collection. These APIs provide access to that data, alongside metadata about data collections and monitoring locations, in standardized machine-readable formats.

    '
  license:
    name: US Government work in the public domain
    url: https://creativecommons.org/publicdomain/zero/1.0/
  termsOfService: https://creativecommons.org/publicdomain/zero/1.0/
  title: USGS Water Data Latest Field Measurements API
  version: 0.71.7
  x-keywords:
  - geospatial
  - data
  - api
  - hydrology
  - USGS
servers:
- description: 'The United States Geological Survey (USGS) collects water data at monitoring locations across the United States using both automated sensors and manual data collection. These APIs provide access to that data, alongside metadata about data collections and monitoring locations, in standardized machine-readable formats.

    '
  url: https://api.waterdata.usgs.gov/ogcapi/v0
tags:
- description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

    '
  name: latest-field-measurements
paths:
  /collections/latest-field-measurements:
    get:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: describeLatest-field-measurementsCollection
      parameters:
      - $ref: '#/components/parameters/f'
      - $ref: '#/components/parameters/lang'
      responses:
        '200':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/Collection
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '404':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/NotFound
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      summary: Get Latest field measurements metadata
      tags:
      - latest-field-measurements
  /collections/latest-field-measurements/items:
    get:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: getLatest-field-measurementsFeatures
      parameters:
      - description: The optional f parameter indicates the output format which the server shall provide as part of the response document.  The default format is GeoJSON.
        explode: false
        in: query
        name: f
        required: false
        schema:
          default: json
          enum:
          - json
          - html
          - jsonld
          - csv
          type: string
        style: form
      - $ref: '#/components/parameters/lang'
      - $ref: '#/components/parameters/bbox'
      - description: The optional limit parameter limits the number of items that are presented in the response document (maximum=50000, default=10).
        explode: false
        in: query
        name: limit
        required: false
        schema:
          default: 10
          maximum: 50000
          minimum: 1
          type: integer
        style: form
      - $ref: '#/components/parameters/crs'
      - $ref: '#/components/parameters/bbox-crs'
      - description: The properties that should be included. The parameter value is a comma-separated list of property names.
        explode: false
        in: query
        name: properties
        required: false
        schema:
          items:
            enum:
            - field_measurements_series_id
            - field_visit_id
            - parameter_code
            - monitoring_location_id
            - observing_procedure_code
            - observing_procedure
            - value
            - unit_of_measure
            - time
            - qualifier
            - vertical_datum
            - approval_status
            - measuring_agency
            - last_modified
            - control_condition
            - measurement_rated
            - year
            - month
            - day
            - time_of_day
            type: string
          type: array
        style: form
      - $ref: '#/components/parameters/skipGeometry'
      - $ref: '#/components/parameters/wda_sortby'
      - $ref: '#/components/parameters/offset'
      - $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/parameters/datetime
      - description: 'A unique identifier representing a single collection series. This corresponds to the `id` field in the `field-measurements-metadata` endpoint. Collection series are defined as the set of field measurements at a given monitoring location for a single parameter code using a single reading type.

          '
        explode: false
        in: query
        name: field_measurements_series_id
        required: false
        schema:
          description: 'A unique identifier representing a single collection series. This corresponds to the `id` field in the `field-measurements-metadata` endpoint. Collection series are defined as the set of field measurements at a given monitoring location for a single parameter code using a single reading type.

            '
          title: Field measurements series ID
          type: string
        style: form
      - description: 'A universally unique identifier (UUID) for the field visit. Multiple measurements may be made during a single field visit.

          '
        explode: false
        in: query
        name: field_visit_id
        required: false
        schema:
          description: 'A universally unique identifier (UUID) for the field visit. Multiple measurements may be made during a single field visit.

            '
          format: uuid
          title: Field visit ID
          type: string
        style: form
      - description: "Parameter codes are 5-digit codes used to identify the constituent measured and the units of measure. A complete list of parameter codes and associated groupings can be found at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items).\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
        explode: false
        in: query
        name: parameter_code
        required: false
        schema:
          description: "Parameter codes are 5-digit codes used to identify the constituent measured and the units of measure. A complete list of parameter codes and associated groupings can be found at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items).\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
          title: Parameter code
          type: string
        style: form
      - description: "A unique identifier representing a single monitoring location. This corresponds to the `id` field in the `monitoring-locations` endpoint. Monitoring location IDs are created by combining the agency code of the agency responsible for the monitoring location (e.g. USGS) with the ID number of the monitoring location (e.g. 02238500), separated by a hyphen (e.g. USGS-02238500).\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
        explode: false
        in: query
        name: monitoring_location_id
        required: false
        schema:
          description: "A unique identifier representing a single monitoring location. This corresponds to the `id` field in the `monitoring-locations` endpoint. Monitoring location IDs are created by combining the agency code of the agency responsible for the monitoring location (e.g. USGS) with the ID number of the monitoring location (e.g. 02238500), separated by a hyphen (e.g. USGS-02238500).\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
          title: Monitoring location ID
          type: string
        style: form
      - description: A short code corresponding to the observing procedure for the field measurement.
        explode: false
        in: query
        name: observing_procedure_code
        required: false
        schema:
          description: A short code corresponding to the observing procedure for the field measurement.
          title: Observing procedure code
          type: string
        style: form
      - description: Water measurement or water-quality observing procedure descriptions.
        explode: false
        in: query
        name: observing_procedure
        required: false
        schema:
          description: Water measurement or water-quality observing procedure descriptions.
          title: Observing procedure
          type: string
        style: form
      - description: 'The value of the observation. Values are transmitted as strings in the JSON response format in order to preserve precision.

          '
        explode: false
        in: query
        name: value
        required: false
        schema:
          description: 'The value of the observation. Values are transmitted as strings in the JSON response format in order to preserve precision.

            '
          title: Value
          type: string
        style: form
      - description: A human-readable description of the units of measurement associated with an observation.
        explode: false
        in: query
        name: unit_of_measure
        required: false
        schema:
          description: A human-readable description of the units of measurement associated with an observation.
          title: Unit of measure
          type: string
        style: form
      - description: "The date an observation represents. You can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `time` that intersects the value of datetime are selected. If a feature has multiple temporal properties, it is the decision of the server whether only a single temporal property is used to determine the extent or all relevant temporal properties.\n"
        explode: false
        in: query
        name: time
        required: false
        schema:
          description: "The date an observation represents. You can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `time` that intersects the value of datetime are selected. If a feature has multiple temporal properties, it is the decision of the server whether only a single temporal property is used to determine the extent or all relevant temporal properties.\n"
          title: Time
          type: string
        style: form
      - description: 'This field indicates any qualifiers associated with an observation, for instance if a sensor may have been impacted by ice or if values were estimated.

          '
        explode: false
        in: query
        name: qualifier
        required: false
        schema:
          description: 'This field indicates any qualifiers associated with an observation, for instance if a sensor may have been impacted by ice or if values were estimated.

            '
          title: Qualifier
          type: string
        style: form
      - description: 'The datum used to determine altitude and vertical position at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

          '
        explode: false
        in: query
        name: vertical_datum
        required: false
        schema:
          description: 'The datum used to determine altitude and vertical position at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

            '
          title: Vertical datum
          type: string
        style: form
      - description: 'Some of the data that you have obtained from this U.S. Geological Survey database may not have received Director''s approval.  Any such data values are qualified as provisional and are subject to revision.  Provisional data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its use. This field reflects the approval status of each record, and is either "Approved", meaining processing review has been completed and the data is approved for publication, or "Provisional" and subject to revision. For more information about provisional data, go to [https://waterdata.usgs.gov/provisional-data-statement/](https://waterdata.usgs.gov/provisional-data-statement/).

          '
        explode: false
        in: query
        name: approval_status
        required: false
        schema:
          description: 'Some of the data that you have obtained from this U.S. Geological Survey database may not have received Director''s approval.  Any such data values are qualified as provisional and are subject to revision.  Provisional data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its use. This field reflects the approval status of each record, and is either "Approved", meaining processing review has been completed and the data is approved for publication, or "Provisional" and subject to revision. For more information about provisional data, go to [https://waterdata.usgs.gov/provisional-data-statement/](https://waterdata.usgs.gov/provisional-data-statement/).

            '
          enum:
          - Provisional
          - Approved
          title: Approval Status
          type: string
        style: form
      - description: The agency performing the measurement.
        explode: false
        in: query
        name: measuring_agency
        required: false
        schema:
          description: The agency performing the measurement.
          title: Measuring agency
          type: string
        style: form
      - description: "The last time a record was refreshed in our database. This may happen due to regular operational processes and does not necessarily indicate anything about the measurement has changed.\nYou can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `last_modified` that intersects the value of datetime are selected.\n"
        explode: false
        in: query
        name: last_modified
        required: false
        schema:
          description: "The last time a record was refreshed in our database. This may happen due to regular operational processes and does not necessarily indicate anything about the measurement has changed.\nYou can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `last_modified` that intersects the value of datetime are selected.\n"
          title: Last modified date
          type: string
        style: form
      - description: 'The state of the control feature at the time of observation.

          '
        explode: false
        in: query
        name: control_condition
        required: false
        schema:
          description: 'The state of the control feature at the time of observation.

            '
          title: Control condition
          type: string
        style: form
      - description: 'A qualitative estimate of the quality of a measurement.

          '
        explode: false
        in: query
        name: measurement_rated
        required: false
        schema:
          description: 'A qualitative estimate of the quality of a measurement.

            '
          title: Measurement rating
          type: string
        style: form
      - description: 'The calendar year the field measurement was taken.

          '
        explode: false
        in: query
        name: year
        required: false
        schema:
          description: 'The calendar year the field measurement was taken.

            '
          title: Year
          type: integer
        style: form
      - description: 'The calendar month the field measurement was taken. If null, the month is unknown.

          '
        explode: false
        in: query
        name: month
        required: false
        schema:
          description: 'The calendar month the field measurement was taken. If null, the month is unknown.

            '
          title: Month
          type: integer
        style: form
      - description: 'The day of the month the field measurement was taken. If null, the day is unknown.

          '
        explode: false
        in: query
        name: day
        required: false
        schema:
          description: 'The day of the month the field measurement was taken. If null, the day is unknown.

            '
          title: Day
          type: integer
        style: form
      - description: 'The time of day the field measurement was taken. If null, the time of day is unknown.

          '
        explode: false
        in: query
        name: time_of_day
        required: false
        schema:
          description: 'The time of day the field measurement was taken. If null, the time of day is unknown.

            '
          format: time
          title: Time of Day
          type: string
        style: form
      - description: 'The agency that is reporting the data. Agency codes are fixed values assigned by the National Water Information System (NWIS). A list of agency codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items).

          '
        explode: false
        in: query
        name: agency_code
        required: false
        schema:
          description: 'The agency that is reporting the data. Agency codes are fixed values assigned by the National Water Information System (NWIS). A list of agency codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items).

            '
          title: Agency code
          type: string
        style: form
      - description: 'The name of the agency that is reporting the data.

          '
        explode: false
        in: query
        name: agency_name
        required: false
        schema:
          description: 'The name of the agency that is reporting the data.

            '
          title: Agency name
          type: string
        style: form
      - description: 'Altitude of the monitoring location referenced to the specified Vertical Datum.

          '
        explode: false
        in: query
        name: altitude
        required: false
        schema:
          description: 'Altitude of the monitoring location referenced to the specified Vertical Datum.

            '
          title: Altitude
          type: number
        style: form
      - description: 'Accuracy of the altitude, in feet. An accuracy of +/- 0.1 foot would be entered as “.1”. Many altitudes are interpolated from the contours on topographic maps; accuracies determined in this way are generally entered as one-half of the contour interval.

          '
        explode: false
        in: query
        name: altitude_accuracy
        required: false
        schema:
          description: 'Accuracy of the altitude, in feet. An accuracy of +/- 0.1 foot would be entered as “.1”. Many altitudes are interpolated from the contours on topographic maps; accuracies determined in this way are generally entered as one-half of the contour interval.

            '
          title: Altitude accuracy
          type: number
        style: form
      - description: 'Codes representing the method used to measure altitude.

          '
        explode: false
        in: query
        name: altitude_method_code
        required: false
        schema:
          description: 'Codes representing the method used to measure altitude.

            '
          title: Altitude method code
          type: string
        style: form
      - description: 'The name of the method used to measure altitude.

          '
        explode: false
        in: query
        name: altitude_method_name
        required: false
        schema:
          description: 'The name of the method used to measure altitude.

            '
          title: Altitude method name
          type: string
        style: form
      - description: 'Local aquifers in the USGS water resources data base are identified by a geohydrologic unit code (a three-digit number related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name).

          '
        explode: false
        in: query
        name: aquifer_code
        required: false
        schema:
          description: 'Local aquifers in the USGS water resources data base are identified by a geohydrologic unit code (a three-digit number related to the age of the formation, followed by a 4 or 5 character abbreviation for the geologic unit or aquifer name).

            '
          title: Aquifer code
          type: string
        style: form
      - description: 'Describes the confinement status of an aquifer at the monitoring location. A confined aquifer is an aquifer below the land surface that is saturated with water. A water table--or unconfined--aquifer is an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

          '
        explode: false
        in: query
        name: aquifer_type_code
        required: false
        schema:
          description: 'Describes the confinement status of an aquifer at the monitoring location. A confined aquifer is an aquifer below the land surface that is saturated with water. A water table--or unconfined--aquifer is an aquifer whose upper water surface (water table) is at atmospheric pressure, and thus is able to rise and fall.

            '
          title: Aquifer type code
          type: string
        style: form
      - description: 'The Basin Code or "drainage basin code" is a two-digit code that further subdivides the 8-digit hydrologic-unit code. The drainage basin code is defined by the USGS State Office where the monitoring location is located.

          '
        explode: false
        in: query
        name: basin_code
        required: false
        schema:
          description: 'The Basin Code or "drainage basin code" is a two-digit code that further subdivides the 8-digit hydrologic-unit code. The drainage basin code is defined by the USGS State Office where the monitoring location is located.

            '
          title: Basin code
          type: string
        style: form
      - description: 'Date the well was completed.

          '
        explode: false
        in: query
        name: construction_date
        required: false
        schema:
          description: 'Date the well was completed.

            '
          title: Construction date
          type: string
        style: form
      - description: 'The contributing drainage area of a lake, stream, wetland, or estuary monitoring location, in square miles. This item should be present only if the contributing area is different from the total drainage area. This situation can occur when part of the drainage area consists of very porous soil or depressions that either allow all runoff to enter the groundwater or traps the water in ponds so that rainfall does not contribute to runoff. A transbasin diversion can also affect the total drainage area.

          '
        explode: false
        in: query
        name: contributing_drainage_area
        required: false
        schema:
          description: 'The contributing drainage area of a lake, stream, wetland, or estuary monitoring location, in square miles. This item should be present only if the contributing area is different from the total drainage area. This situation can occur when part of the drainage area consists of very porous soil or depressions that either allow all runoff to enter the groundwater or traps the water in ponds so that rainfall does not contribute to runoff. A transbasin diversion can also affect the total drainage area.

            '
          title: Contributing drainage area
          type: number
        style: form
      - description: 'The code for the country in which the monitoring location is located.

          '
        explode: false
        in: query
        name: country_code
        required: false
        schema:
          description: 'The code for the country in which the monitoring location is located.

            '
          title: Country code
          type: string
        style: form
      - description: 'The name of the country in which the monitoring location is located.

          '
        explode: false
        in: query
        name: country_name
        required: false
        schema:
          description: 'The name of the country in which the monitoring location is located.

            '
          title: Country name
          type: string
        style: form
      - description: 'The code for the county or county equivalent (parish, borough, etc.) in which the monitoring location is located. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items).

          '
        explode: false
        in: query
        name: county_code
        required: false
        schema:
          description: 'The code for the county or county equivalent (parish, borough, etc.) in which the monitoring location is located. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items).

            '
          title: County code
          type: string
        style: form
      - description: 'The name of the county or county equivalent (parish, borough, etc.) in which the monitoring location is located. [A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items).

          '
        explode: false
        in: query
        name: county_name
        required: false
        schema:
          description: 'The name of the county or county equivalent (parish, borough, etc.) in which the monitoring location is located. [A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/counties/items).

            '
          title: County name
          type: string
        style: form
      - description: 'A code indicating the source of water-level data.

          '
        explode: false
        in: query
        name: depth_source_code
        required: false
        schema:
          description: 'A code indicating the source of water-level data.

            '
          title: Depth source code
          type: string
        style: form
      - description: 'The Water Science Centers (WSCs) across the United States use the FIPS state code as the district code. In some case, monitoring locations and samples may be managed by a water science center that is adjacent to the state in which the monitoring location actually resides. For example a monitoring location may have a district code of 30 which translates to Montana, but the state code could be 56 for Wyoming because that is where the monitoring location actually is located.

          '
        explode: false
        in: query
        name: district_code
        required: false
        schema:
          description: 'The Water Science Centers (WSCs) across the United States use the FIPS state code as the district code. In some case, monitoring locations and samples may be managed by a water science center that is adjacent to the state in which the monitoring location actually resides. For example a monitoring location may have a district code of 30 which translates to Montana, but the state code could be 56 for Wyoming because that is where the monitoring location actually is located.

            '
          title: District code
          type: string
        style: form
      - description: 'The area enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the stream above that point.

          '
        explode: false
        in: query
        name: drainage_area
        required: false
        schema:
          description: 'The area enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the stream above that point.

            '
          title: Drainage area
          type: number
        style: form
      - description: 'The total depth to which the hole is drilled, in feet below land surface datum. Note: Not all groundwater monitoring locations have information on Hole Depth. Such monitoring locations will not be retrieved using this search criteria.

          '
        explode: false
        in: query
        name: hole_constructed_depth
        required: false
        schema:
          description: 'The total depth to which the hole is drilled, in feet below land surface datum. Note: Not all groundwater monitoring locations have information on Hole Depth. Such monitoring locations will not be retrieved using this search criteria.

            '
          title: Hole constructed depth
          type: number
        style: form
      - description: 'Indicates the method used to determine latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items).

          '
        explode: false
        in: query
        name: horizontal_position_method_code
        required: false
        schema:
          description: 'Indicates the method used to determine latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items).

            '
          title: Horizontal position method code
          type: string
        style: form
      - description: 'Indicates the method used to determine latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items).

          '
        explode: false
        in: query
        name: horizontal_position_method_name
        required: false
        schema:
          description: 'Indicates the method used to determine latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-method-codes/items).

            '
          title: Horizontal position method name
          type: string
        style: form
      - description: 'Indicates the accuracy of the latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items).

          '
        explode: false
        in: query
        name: horizontal_positional_accuracy
        required: false
        schema:
          description: 'Indicates the accuracy of the latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items).

            '
          title: Horizontal positional accuracy
          type: string
        style: form
      - description: 'Indicates the accuracy of the latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items).

          '
        explode: false
        in: query
        name: horizontal_positional_accuracy_code
        required: false
        schema:
          description: 'Indicates the accuracy of the latitude longitude values. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-accuracy-codes/items).

            '
          title: Horizontal positional accuracy code
          type: string
        style: form
      - description: "The hydrologic unit code (HUC) for the monitoring location. Supports prefix matching — querying with a shorter HUC (e.g. \"04\") matches all locations within that hydrologic region.\n Search will match partial HUCs."
        explode: false
        in: query
        name: hydrologic_unit_code
        required: false
        schema:
          description: "The hydrologic unit code (HUC) for the monitoring location. Supports prefix matching — querying with a shorter HUC (e.g. \"04\") matches all locations within that hydrologic region.\n Search will match partial HUCs."
          title: Hydrologic unit code (HUC)
          type: string
        style: form
      - description: 'Codes for primary governmental or administrative divisions of the county or county equivalent in which the monitoring location is located.

          '
        explode: false
        in: query
        name: minor_civil_division_code
        required: false
        schema:
          description: 'Codes for primary governmental or administrative divisions of the county or county equivalent in which the monitoring location is located.

            '
          title: Minor civil division code
          type: string
        style: form
      - description: 'This is the official name of the monitoring location in the database. For well information this can be a district-assigned local number.

          '
        explode: false
        in: query
        name: monitoring_location_name
        required: false
        schema:
          description: 'This is the official name of the monitoring location in the database. For well information this can be a district-assigned local number.

            '
          title: Monitoring location name
          type: string
        style: form
      - description: "Each monitoring location in the USGS data base has a unique 8- to 15-digit identification number.\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
        explode: false
        in: query
        name: monitoring_location_number
        required: false
        schema:
          description: "Each monitoring location in the USGS data base has a unique 8- to 15-digit identification number.\n Split parameters are enabled for this field, so you can supply multiple values separated by commas."
          title: Monitoring location number
          type: string
        style: form
      - description: 'National aquifers are the principal aquifers or aquifer systems in the United States, defined as regionally extensive aquifers or aquifer systems that have the potential to be used as a source of potable water. Not all groundwater monitoring locations can be associated with a National Aquifer. Such monitoring locations will not be retrieved using this search criteria. A list of National aquifer codes and names is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/national-aquifer-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/national-aquifer-codes/items).

          '
        explode: false
        in: query
        name: national_aquifer_code
        required: false
        schema:
          description: 'National aquifers are the principal aquifers or aquifer systems in the United States, defined as regionally extensive aquifers or aquifer systems that have the potential to be used as a source of potable water. Not all groundwater monitoring locations can be associated with a National Aquifer. Such monitoring locations will not be retrieved using this search criteria. A list of National aquifer codes and names is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/national-aquifer-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/national-aquifer-codes/items).

            '
          title: National aquifer code
          type: string
        style: form
      - description: 'Coordinates are published in EPSG:4326 / WGS84 / World Geodetic System 1984. This field indicates the original datum used to determine coordinates before they were converted. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items).

          '
        explode: false
        in: query
        name: original_horizontal_datum
        required: false
        schema:
          description: 'Coordinates are published in EPSG:4326 / WGS84 / World Geodetic System 1984. This field indicates the original datum used to determine coordinates before they were converted. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items).

            '
          title: Original horizontal datum
          type: string
        style: form
      - description: 'Coordinates are published in EPSG:4326 / WGS84 / World Geodetic System 1984. This field indicates the original datum used to determine coordinates before they were converted. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items).

          '
        explode: false
        in: query
        name: original_horizontal_datum_name
        required: false
        schema:
          description: 'Coordinates are published in EPSG:4326 / WGS84 / World Geodetic System 1984. This field indicates the original datum used to determine coordinates before they were converted. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/coordinate-datum-codes/items).

            '
          title: Original horizontal datum name
          type: string
        style: form
      - description: 'A description of the hydrologic setting of the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items).

          '
        explode: false
        in: query
        name: site_type
        required: false
        schema:
          description: 'A description of the hydrologic setting of the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items).

            '
          title: Monitoring location type
          type: string
        style: form
      - description: 'A code describing the hydrologic setting of the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items).

          '
        explode: false
        in: query
        name: site_type_code
        required: false
        schema:
          description: 'A code describing the hydrologic setting of the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/site-types/items).

            '
          title: Monitoring location type code
          type: string
        style: form
      - description: 'State code. A [two-digit ANSI code](https://www2.census.gov/geo/docs/reference/state.txt) (formerly FIPS code) as defined by the American National Standards Institute, to define States and equivalents. A three-digit ANSI code is used to define counties and county equivalents. [A lookup table is available.](https://www.census.gov/library/reference/code-lists/ansi.html#states) The only countries with political subdivisions other than the US are Mexico and Canada. The Mexican states have US state codes ranging from 81-86 and Canadian provinces have state codes ranging from 90-98.

          '
        explode: false
        in: query
        name: state_code
        required: false
        schema:
          description: 'State code. A [two-digit ANSI code](https://www2.census.gov/geo/docs/reference/state.txt) (formerly FIPS code) as defined by the American National Standards Institute, to define States and equivalents. A three-digit ANSI code is used to define counties and county equivalents. [A lookup table is available.](https://www.census.gov/library/reference/code-lists/ansi.html#states) The only countries with political subdivisions other than the US are Mexico and Canada. The Mexican states have US state codes ranging from 81-86 and Canadian provinces have state codes ranging from 90-98.

            '
          title: State code
          type: string
        style: form
      - description: 'The name of the state or state equivalent in which the monitoring location is located.

          '
        explode: false
        in: query
        name: state_name
        required: false
        schema:
          description: 'The name of the state or state equivalent in which the monitoring location is located.

            '
          title: State name
          type: string
        style: form
      - description: 'A short code describing the time zone used by a monitoring location.

          '
        explode: false
        in: query
        name: time_zone_abbreviation
        required: false
        schema:
          description: 'A short code describing the time zone used by a monitoring location.

            '
          title: Time zone abbreviation
          type: string
        style: form
      - description: 'A flag indicating whether or not a monitoring location uses daylight savings.

          '
        explode: false
        in: query
        name: uses_daylight_savings
        required: false
        schema:
          description: 'A flag indicating whether or not a monitoring location uses daylight savings.

            '
          title: Uses daylight savings flag
          type: string
        style: form
      - description: 'The datum used to determine altitude and vertical position at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

          '
        explode: false
        in: query
        name: vertical_datum_name
        required: false
        schema:
          description: 'The datum used to determine altitude and vertical position at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

            '
          title: Vertical datum name
          type: string
        style: form
      - description: 'The vertical datum used to determine altitude at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

          '
        explode: false
        in: query
        name: vertical_datum_site
        required: false
        schema:
          description: 'The vertical datum used to determine altitude at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

            '
          title: Vertical datum (site)
          type: string
        style: form
      - description: 'The depth of the finished well, in feet below land surface datum. Note: Not all groundwater monitoring locations have information on Well Depth. Such monitoring locations will not be retrieved using this search criteria.

          '
        explode: false
        in: query
        name: well_constructed_depth
        required: false
        schema:
          description: 'The depth of the finished well, in feet below land surface datum. Note: Not all groundwater monitoring locations have information on Well Depth. Such monitoring locations will not be retrieved using this search criteria.

            '
          title: Well constructed depth
          type: number
        style: form
      - $ref: '#/components/parameters/filter'
      responses:
        '200':
          $ref: '#/components/responses/LatestFieldMeasurementsFeatures'
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '404':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/NotFound
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Get Latest field measurements items
      tags:
      - latest-field-measurements
    options:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: optionsLatest-field-measurementsFeatures
      responses:
        '200':
          description: options response
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Options for Latest field measurements items
      tags:
      - latest-field-measurements
    post:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: getCQL2Latest-field-measurementsFeatures
      requestBody:
        content:
          application/json:
            schema:
              $ref: https://schemas.opengis.net/cql2/1.0/cql2.json
        description: Get items with CQL2
        required: true
      responses:
        '200':
          $ref: '#/components/responses/LatestFieldMeasurementsFeatures'
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Get Latest field measurements items with CQL2
      tags:
      - latest-field-measurements
  /collections/latest-field-measurements/items/{featureId}:
    get:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: getLatest-field-measurementsFeature
      parameters:
      - $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/parameters/featureId
      - $ref: '#/components/parameters/crs'
      - $ref: '#/components/parameters/f'
      - $ref: '#/components/parameters/lang'
      responses:
        '200':
          $ref: '#/components/responses/LatestFieldMeasurementsFeature'
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '404':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/NotFound
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Get Latest field measurements item by id
      tags:
      - latest-field-measurements
    options:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: optionsLatest-field-measurementsFeature
      parameters:
      - $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/parameters/featureId
      responses:
        '200':
          description: options response
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Options for Latest field measurements item by id
      tags:
      - latest-field-measurements
  /collections/latest-field-measurements/queryables:
    get:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: getLatest-field-measurementsQueryables
      parameters:
      - description: The properties that should be included. The parameter value is a comma-separated list of property names.
        explode: false
        in: query
        name: properties
        required: false
        schema:
          items:
            enum:
            - field_measurements_series_id
            - field_visit_id
            - parameter_code
            - monitoring_location_id
            - observing_procedure_code
            - observing_procedure
            - value
            - unit_of_measure
            - time
            - qualifier
            - vertical_datum
            - approval_status
            - measuring_agency
            - last_modified
            - control_condition
            - measurement_rated
            - year
            - month
            - day
            - time_of_day
            type: string
          type: array
        style: form
      - $ref: '#/components/parameters/f'
      - description: The profile to be applied to a given request
        explode: false
        in: query
        name: profile
        required: false
        schema:
          enum:
          - actual-domain
          - valid-domain
          type: string
        style: form
      - $ref: '#/components/parameters/lang'
      responses:
        '200':
          $ref: '#/components/responses/Queryables'
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '404':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/NotFound
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Get Latest field measurements queryables
      tags:
      - latest-field-measurements
  /collections/latest-field-measurements/schema:
    get:
      description: 'Field measurements are physically measured values collected during a visit to the monitoring location. Field measurements consist of measurements of gage height and discharge, and readings of groundwater levels, and are primarily used as calibration readings for the automated sensors collecting continuous data. They are collected at a low frequency, and delivery of the data in WDFN may be delayed due to data processing time.

        '
      operationId: getLatest-field-measurementsSchema
      parameters:
      - $ref: '#/components/parameters/f'
      - $ref: '#/components/parameters/lang'
      responses:
        '200':
          $ref: '#/components/responses/Queryables'
        '400':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/InvalidParameter
        '403':
          $ref: '#/components/responses/Forbidden403'
        '404':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/NotFound
        '429':
          $ref: '#/components/responses/TooManyRequests429'
        '500':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/ServerError
      security:
      - ApiKeyQuery: []
      - ApiKeyHeader: []
      summary: Get Latest field measurements schema
      tags:
      - latest-field-measurements
components:
  parameters:
    lang:
      description: The optional lang parameter instructs the server return a response in a certain language, if supported.  If the language is not among the available values, the Accept-Language header language will be used if it is supported. If the header is missing, the default server language is used. Note that providers may only support a single language (or often no language at all), that can be different from the server language.  Language strings can be written in a complex (e.g. "fr-CA,fr;q=0.9,en-US;q=0.8,en;q=0.7"), simple (e.g. "de") or locale-like (e.g. "de-CH" or "fr_BE") fashion.
      in: query
      name: lang
      required: false
      schema:
        default: en-US
        enum:
        - en-US
        type: string
    skipGeometry:
      description: This option can be used to skip response geometries for each feature.
      explode: false
      in: query
      name: skipGeometry
      required: false
      schema:
        default: false
        type: boolean
      style: form
    bbox-crs:
      description: Indicates the coordinate reference system for the given bbox coordinates.
      explode: false
      in: query
      name: bbox-crs
      required: false
      schema:
        format: uri
        type: string
      style: form
    wda_sortby:
      description: "Specifies a comma-separated list of property names by which the response shall be sorted.  If the property name is preceded by a plus (+) sign it indicates an ascending sort for that property.  If the property name is preceded by a minus (-) sign it indicates a descending sort for that property.  If the property is not preceded by a plus or minus, then the default sort order implied is ascending (+).  \n\nOnly a single page of data can be returned when specifying sortby. If you need more than a single page of data, don't specify a sortby value and sort the full data set after it's been downloaded."
      explode: false
      in: query
      name: sortby
      required: false
      schema:
        items:
          pattern: '[+|-]?[A-Za-z_].*'
          type: string
        minItems: 1
        type: array
      style: form
    crs:
      description: Indicates the coordinate reference system for the results.
      explode: false
      in: query
      name: crs
      required: false
      schema:
        format: uri
        type: string
      style: form
    bbox:
      description: Only features that have a geometry that intersects the bounding box are selected.The bounding box is provided as four or six numbers, depending on whether the coordinate reference system includes a vertical axis (height or depth).
      explode: false
      in: query
      name: bbox
      required: false
      schema:
        items:
          type: number
        maxItems: 6
        minItems: 4
        type: array
      style: form
    offset:
      description: The optional offset parameter indicates the index within the result set from which the server shall begin presenting results in the response document.  The first element has an index of 0 (default).
      explode: false
      in: query
      name: offset
      required: false
      schema:
        default: 0
        minimum: 0
        type: integer
      style: form
    filter:
      description: "CQL Text filter expression.  CQL JSON cannot be used here, only in the body. \nSee also: https://docs.pygeoapi.io/en/latest/cql.html \n\nExample: time_series_id IN ('64ee32f5350a4ec4967435dcd2e364ea', '3e55d9c2d8a54bec9ca5e292b07d5a96')"
      in: query
      name: filter
      required: false
      schema:
        type: string
    f:
      description: The optional f parameter indicates the output format which the server shall provide as part of the response document.  The default format is GeoJSON.  CSV is also available.
      explode: false
      in: query
      name: f
      required: false
      schema:
        default: json
        enum:
        - json
        - html
        - jsonld
        - csv
        type: string
      style: form
  schemas:
    queryables:
      properties:
        queryables:
          items:
            $ref: '#/components/schemas/queryable'
          type: array
      required:
      - queryables
      type: object
    queryable:
      properties:
        description:
          description: a human-readable narrative describing the queryable
          type: string
        language:
          default: en
          description: the language used for the title and description
          type: string
        queryable:
          description: the token that may be used in a CQL predicate
          type: string
        title:
          description: a human readable title for the queryable
          type: string
        type:
          description: the data type of the queryable
          type: string
        type-ref:
          description: a reference to the formal definition of the type
          format: url
          type: string
      required:
      - queryable
      - type
      type: object
    LatestFieldMeasurementsFeatureCollection:
      properties:
        features:
          items:
            $ref: '#/components/schemas/LatestFieldMeasurementsFeature'
          type: array
        links:
          items:
            $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/schemas/link
          type: array
        numberMatched:
          minimum: 0
          type: integer
        numberReturned:
          minimum: 0
          type: integer
        timeStamp:
          format: date-time
          type: string
        type:
          enum:
          - FeatureCollection
          type: string
      required:
      - type
      - features
      type: object
    LatestFieldMeasurementsFeature:
      properties:
        geometry:
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/schemas/geometryGeoJSON
        id:
          type: string
        properties:
          properties:
            approval_status:
              description: 'Some of the data that you have obtained from this U.S. Geological Survey database may not have received Director''s approval.  Any such data values are qualified as provisional and are subject to revision.  Provisional data are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its use. This field reflects the approval status of each record, and is either "Approved", meaining processing review has been completed and the data is approved for publication, or "Provisional" and subject to revision. For more information about provisional data, go to [https://waterdata.usgs.gov/provisional-data-statement/](https://waterdata.usgs.gov/provisional-data-statement/).

                '
              enum:
              - Provisional
              - Approved
              title: Approval Status
              type:
              - string
              - 'null'
            control_condition:
              description: 'The state of the control feature at the time of observation.

                '
              title: Control condition
              type:
              - string
              - 'null'
            day:
              description: 'The day of the month the field measurement was taken. If null, the day is unknown.

                '
              title: Day
              type:
              - integer
              - 'null'
            field_measurements_series_id:
              description: 'A unique identifier representing a single collection series. This corresponds to the `id` field in the `field-measurements-metadata` endpoint. Collection series are defined as the set of field measurements at a given monitoring location for a single parameter code using a single reading type.

                '
              title: Field measurements series ID
              type:
              - string
              - 'null'
            field_visit_id:
              description: 'A universally unique identifier (UUID) for the field visit. Multiple measurements may be made during a single field visit.

                '
              format: uuid
              title: Field visit ID
              type:
              - string
              - 'null'
            last_modified:
              description: "The last time a record was refreshed in our database. This may happen due to regular operational processes and does not necessarily indicate anything about the measurement has changed.\nYou can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `last_modified` that intersects the value of datetime are selected.\n"
              title: Last modified date
              type:
              - string
              - 'null'
            measurement_rated:
              description: 'A qualitative estimate of the quality of a measurement.

                '
              title: Measurement rating
              type:
              - string
              - 'null'
            measuring_agency:
              description: The agency performing the measurement.
              title: Measuring agency
              type:
              - string
              - 'null'
            monitoring_location_id:
              description: 'A unique identifier representing a single monitoring location. This corresponds to the `id` field in the `monitoring-locations` endpoint. Monitoring location IDs are created by combining the agency code of the agency responsible for the monitoring location (e.g. USGS) with the ID number of the monitoring location (e.g. 02238500), separated by a hyphen (e.g. USGS-02238500).

                '
              title: Monitoring location ID
              type:
              - string
              - 'null'
            month:
              description: 'The calendar month the field measurement was taken. If null, the month is unknown.

                '
              title: Month
              type:
              - integer
              - 'null'
            observing_procedure:
              description: Water measurement or water-quality observing procedure descriptions.
              title: Observing procedure
              type:
              - string
              - 'null'
            observing_procedure_code:
              description: A short code corresponding to the observing procedure for the field measurement.
              title: Observing procedure code
              type:
              - string
              - 'null'
            parameter_code:
              description: 'Parameter codes are 5-digit codes used to identify the constituent measured and the units of measure. A complete list of parameter codes and associated groupings can be found at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/parameter-codes/items).

                '
              title: Parameter code
              type:
              - string
              - 'null'
            qualifier:
              description: 'This field indicates any qualifiers associated with an observation, for instance if a sensor may have been impacted by ice or if values were estimated.

                '
              title: Qualifier
              type:
              - string
              - 'null'
            time:
              description: "The date an observation represents. You can query this field using date-times or intervals, adhering to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `time` that intersects the value of datetime are selected. If a feature has multiple temporal properties, it is the decision of the server whether only a single temporal property is used to determine the extent or all relevant temporal properties.\n"
              title: Time
              type:
              - string
              - 'null'
            time_of_day:
              description: 'The time of day the field measurement was taken. If null, the time of day is unknown.

                '
              format: time
              title: Time of Day
              type:
              - string
              - 'null'
            unit_of_measure:
              description: A human-readable description of the units of measurement associated with an observation.
              title: Unit of measure
              type:
              - string
              - 'null'
            value:
              description: 'The value of the observation. Values are transmitted as strings in the JSON response format in order to preserve precision.

                '
              title: Value
              type:
              - string
              - 'null'
            vertical_datum:
              description: 'The datum used to determine altitude and vertical position at the monitoring location. A list of codes is available at [https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items](https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items).

                '
              title: Vertical datum
              type:
              - string
              - 'null'
            year:
              description: 'The calendar year the field measurement was taken.

                '
              title: Year
              type:
              - integer
              - 'null'
          type: object
        type:
          enum:
          - Feature
          type: string
      required:
      - type
      - properties
      type: object
    Error:
      properties:
        error:
          properties:
            code:
              description: Error code such as OVER_RATE_LIMIT, see https://api.data.gov/docs/developer-manual/#general-web-service-errors
              type: string
            message:
              description: Error message
              type: string
          required:
          - code
          - message
          type: object
      type: object
  responses:
    LatestFieldMeasurementsFeature:
      content:
        application/geo+json:
          example:
            geometry:
              coordinates:
              - -88.01
              - 44.5286111111111
              type: Point
            id: 3fa85f64-5717-4562-b3fc-2c963f66afa6
            properties:
              approval_status: Approved
              control_condition: Clear
              day: 15
              field_measurements_series_id: WDA-STABLE-SERIES-0001
              field_visit_id: 00000000-0000-0000-0000-000000000002
              last_modified: '2025-06-16T14:13:28+00:00'
              measurement_rated: Fair
              measuring_agency: USGS
              monitoring_location_id: USGS-09380000
              month: 6
              observing_procedure: GW level, calib steel tape
              observing_procedure_code: S
              parameter_code: '00060'
              qualifier: Ice
              time: '2024-06-15T14:00:00+00:00'
              time_of_day: 12:00:00+00:00
              unit_of_measure: ft3/s
              value: '579.40'
              vertical_datum: NAVD88
              year: 2020
            type: Feature
          schema:
            $ref: '#/components/schemas/LatestFieldMeasurementsFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Latest field measurements.
    Queryables:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/queryables'
      description: successful queryables operation
    LatestFieldMeasurementsFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry:
                coordinates:
                - -88.01
                - 44.5286111111111
                type: Point
              id: 3fa85f64-5717-4562-b3fc-2c963f66afa6
              properties:
                approval_status: Approved
                control_condition: Clear
                day: 15
                field_measurements_series_id: WDA-STABLE-SERIES-0001
                field_visit_id: 00000000-0000-0000-0000-000000000002
                last_modified: '2025-06-16T14:13:28+00:00'
                measurement_rated: Fair
                measuring_agency: USGS
                monitoring_location_id: USGS-09380000
                month: 6
                observing_procedure: GW level, calib steel tape
                observing_procedure_code: S
                parameter_code: '00060'
                qualifier: Ice
                time: '2024-06-15T14:00:00+00:00'
                time_of_day: 12:00:00+00:00
                unit_of_measure: ft3/s
                value: '579.40'
                vertical_datum: NAVD88
                year: 2020
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-field-measurements/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberMatched: 1
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/LatestFieldMeasurementsFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Latest field measurements.
    Forbidden403:
      content:
        application/json:
          examples:
            missingApiKey:
              summary: Missing API Key
              value:
                error:
                  code: API_KEY_MISSING
                  message: No api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/
          schema:
            $ref: '#/components/schemas/Error'
        application/xml:
          example: "<response>\n      <error>\n        <code>API_KEY_MISSING</code>\n        <message>No api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/</message>\n      </error>\n    </response>"
          schema:
            properties:
              response:
                properties:
                  error:
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                    required:
                    - code
                    - message
                    type: object
                required:
                - error
                type: object
            type: object
        text/csv:
          examples:
            missingApiKeyCsv:
              summary: Missing API Key (CSV)
              value: 'Error Code,Error Message

                API_KEY_MISSING, No api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/'
          schema:
            type: string
        text/html:
          examples:
            missingApiKeyHtml:
              summary: Missing API Key (HTML)
              value: "<html>\n      <body>\n        <h1>API_KEY_MISSING</h1>\n        <p>No api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/</p>\n      </body>\n    </html>"
          schema:
            type: string
      description: Forbidden - API key is missing or not authorized for this resource.
    TooManyRequests429:
      content:
        application/json:
          examples:
            rateLimitExceeded:
              summary: Rate Limit Exceeded
              value:
                error:
                  code: OVER_RATE_LIMIT
                  message: You have exceeded your rate limit. Make sure you provided your API key from https://api.waterdata.usgs.gov/signup/, then either try again later or contact us at https://waterdata.usgs.gov/questions-comments/?referrerUrl=https://api.waterdata.usgs.gov for assistance.
          schema:
            $ref: '#/components/schemas/Error'
        application/xml:
          example: "<response>\n      <error>\n        <code>OVER_RATE_LIMIT</code>\n        <message>You have exceeded your rate limit. Make sure you provided your API key from https://api.waterdata.usgs.gov/signup/, then either try again later or contact us at https://waterdata.usgs.gov/questions-comments/?referrerUrl=https://api.waterdata.usgs.gov for assistance.</message>\n      </error>\n    </response>"
          schema:
            properties:
              response:
                properties:
                  error:
                    properties:
                      code:
                        type: string
                      message:
                        type: string
                    required:
                    - code
                    - message
                    type: object
                required:
                - error
                type: object
            type: object
        text/csv:
          examples:
            rateLimitCsv:
              summary: Rate Limit Exceeded (CSV)
              value: 'Error Code,Error Message

                OVER_RATE_LIMIT,You have exceeded your rate limit. Make sure you provided your API key from https://api.waterdata.usgs.gov/signup/, then either try again later or contact us at https://waterdata.usgs.gov/questions-comments/?referrerUrl=https://api.waterdata.usgs.gov for assistance.'
          schema:
            type: string
        text/html:
          examples:
            rateLimitHtml:
              summary: Rate Limit Exceeded (HTML)
              value: "<html>\n      <body>\n        <h1>OVER_RATE_LIMIT</h1>\n        <p>You have exceeded your rate limit. Make sure you provided your API key from https://api.waterdata.usgs.gov/signup/, then either try again later or contact us at https://waterdata.usgs.gov/questions-comments/?referrerUrl=https://api.waterdata.usgs.gov for assistance.</p>\n      </body>\n    </html>"
          schema:
            type: string
      description: Too Many Requests - Rate limit exceeded.
  securitySchemes:
    ApiKeyHeader:
      description: Providing your API key gives you higher rate limits when querying our APIs. You can obtain an API key at https://api.waterdata.usgs.gov/signup
      in: header
      name: api_key
      type: apiKey
    ApiKeyQuery:
      description: Providing your API key gives you higher rate limits when querying our APIs. You can obtain an API key at https://api.waterdata.usgs.gov/signup
      in: query
      name: api_key
      type: apiKey