openapi: 3.0.2
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: 'These APIs provide OGC-compliant interfaces to USGS water data, letting you download continuous sensor measurements, discrete field measurements, metadata about monitoring locations, and more.

    '
  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 OGC APIs agency-codes latest-field-measurements API
  version: 0.56.0
  x-keywords:
  - geospatial
  - data
  - api
  - hydrology
  - USGS
servers:
- description: 'These APIs provide OGC-compliant interfaces to USGS water data, letting you download continuous sensor measurements, discrete field measurements, metadata about monitoring locations, and more.

    '
  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:
            - id
            - 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 universally unique identifier (UUID) representing a single version of a record. It is not stable over time. Every time the record is refreshed in our database (which may happen as part of normal operations and does not imply any change to the data itself) a new ID will be generated. There may be multiple readings occurring at identical times during a single field visit; to uniquely identify a set of readings over time, use the `field_visit_id` field.

          '
        explode: false
        in: query
        name: id
        required: false
        schema:
          description: 'A universally unique identifier (UUID) representing a single version of a record. It is not stable over time. Every time the record is refreshed in our database (which may happen as part of normal operations and does not imply any change to the data itself) a new ID will be generated. There may be multiple readings occurring at identical times during a single field visit; to uniquely identify a set of readings over time, use the `field_visit_id` field.

            '
          format: uuid
          title: Record identifier
          type: string
        style: form
      - 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
      - $ref: '#/components/parameters/filter'
      responses:
        '200':
          $ref: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/Features
        '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: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/Features
        '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: https://schemas.opengis.net/ogcapi/features/part1/1.0/openapi/ogcapi-features-1.yaml#/components/responses/Feature
        '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:
            - id
            - 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:
    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
    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
    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
    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
    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
    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
    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-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
    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
  responses:
    Queryables:
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/queryables'
      description: successful queryables operation
    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: "&ltresponse&gt\n      &lterror&gt\n        &ltcode&gtOVER_RATE_LIMIT&lt/code&gt\n        &ltmessage&gtYou 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.&lt/message&gt\n      &lt/error&gt\n    &lt/response&gt"
          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: "&lthtml&gt\n      &ltbody&gt\n        &lth1&gtOVER_RATE_LIMIT&lt/h1&gt\n        &ltp&gtYou 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.&lt/p&gt\n      &lt/body&gt\n    &lt/html&gt"
          schema:
            type: string
      description: Too Many Requests - Rate limit exceeded.
    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: "&ltresponse&gt\n      &lterror&gt\n        &ltcode&gtAPI_KEY_MISSING&lt/code&gt\n        &ltmessage&gtNo api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/&lt/message&gt\n      &lt/error&gt\n    &lt/response&gt"
          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: "&lthtml&gt\n      &ltbody&gt\n        &lth1&gtAPI_KEY_MISSING&lt/h1&gt\n        &ltp&gtNo api_key was supplied. Get one at https://api.waterdata.usgs.gov/signup/&lt/p&gt\n      &lt/body&gt\n    &lt/html&gt"
          schema:
            type: string
      description: Forbidden - API key is missing or not authorized for this resource.
  schemas:
    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
    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
    queryables:
      properties:
        queryables:
          items:
            $ref: '#/components/schemas/queryable'
          type: array
      required:
      - queryables
      type: object
  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