openapi: 3.1.0
info:
  title: ERDDAP REST Data Access API
  version: '2.23'
  description: "OpenAPI specification for ERDDAP (Environmental Research Division's Data\nAccess Program), a scientific data server providing simple, consistent\naccess to gridded and tabular scientific datasets.\n\nERDDAP runs at many institutions worldwide. Set the server URL to the base\nURL of the instance you want to access.\n\n## Two-phase workflow for data access\n\n1. **Discover** — search for datasets (`/search/`) or list all (`/info/index.json`).\n2. **Inspect** — fetch dataset metadata (`/info/{datasetID}/index.json`) to learn\n   variable names, data types, units, and coordinate ranges.\n3. **Download** — request data from `/tabledap/` or `/griddap/` using the\n   variable names and constraint ranges discovered in step 2.\n\n## Constraint syntax (tabledap and griddap)\n\nConstraints are appended to the query string as `&varName>=value` pairs.\n\n| Operator | Meaning |\n|----------|---------|\n| `=`  | equals |\n| `!=` | not equals |\n| `<`, `<=`, `>`, `>=` | numeric / time comparison |\n| `=~` | Java regular expression match |\n\nString values must be double-quoted: `&stationType=\"fixed\"`.\nTime values can be ISO 8601 (`2020-01-01T00:00:00Z`), seconds since\n1970-01-01 (Unix epoch), or relative expressions (`now-7days`, `now-1hour`).\nSpatial relative extremes are also supported: `&latitude<min(latitude)+10`.\n\n## Response format selection\n\nThe desired format is embedded in the path (`.json`, `.csv`, `.nc`, etc.)\nrather than in an `Accept` header. See the `MetadataFileType` and\n`DataFileType` schemas for the full list.\n"
  contact:
    name: ERDDAP Project
    url: https://github.com/ERDDAP/erddap
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0
servers:
- url: https://coastwatch.pfeg.noaa.gov/erddap
  description: NOAA CoastWatch West Coast Node (reference server)
- url: https://erddap.ioos.us/erddap
  description: US IOOS ERDDAP
- url: '{baseUrl}'
  description: Any ERDDAP server — replace with the instance base URL
  variables:
    baseUrl:
      default: https://coastwatch.pfeg.noaa.gov/erddap
      description: 'Base URL of any ERDDAP server, including the /erddap path segment

        if present (e.g. https://example.org/erddap).

        '
tags:
- name: Data Access
  description: Download subsets of tabular or gridded data.
paths:
  /tabledap/{datasetID}.{fileType}:
    get:
      summary: Download a subset of a tabular dataset
      operationId: getTabledapData
      tags:
      - Data Access
      description: 'Retrieves in-situ, station, trajectory, or profile data (CDM types

        other than Grid).


        **Query string structure:** `?variables&constraints`


        - `variables` — comma-separated variable names; omit for all variables.

        - `constraints` — `&varName>=value` pairs appended after the variable list.


        **Special result modifiers (append to query):**

        - `&distinct()` — return only unique rows.

        - `&orderBy("var1,var2")` — sort results.

        - `&orderByMax("var1")` — keep only the row with the max value per group.

        - `&units("UDUNITS")` — convert units.


        Always call `/info/{datasetID}/index.json` first to discover valid

        variable names and coordinate ranges.

        '
      parameters:
      - name: datasetID
        in: path
        required: true
        schema:
          type: string
        example: cwwcNDBCMet
      - name: fileType
        in: path
        required: true
        schema:
          $ref: '#/components/schemas/DataFileType'
      - name: variables
        in: query
        description: 'Comma-separated variable names to include in the response.

          Omit to return all variables.

          '
        schema:
          type: string
        example: time,latitude,longitude,wtmp
      - name: time>=
        in: query
        description: Lower time bound (ISO 8601 or `now-Nunit` expression).
        schema:
          type: string
        example: '2020-01-01T00:00:00Z'
      - name: time<=
        in: query
        description: Upper time bound.
        schema:
          type: string
      - name: latitude>=
        in: query
        schema:
          type: number
      - name: latitude<=
        in: query
        schema:
          type: number
      - name: longitude>=
        in: query
        schema:
          type: number
      - name: longitude<=
        in: query
        schema:
          type: number
      responses:
        '200':
          description: Tabular data subset in the requested format.
          content:
            text/csv:
              schema:
                type: string
            application/json:
              schema:
                $ref: '#/components/schemas/TabledapJsonResponse'
            application/x-netcdf:
              schema:
                type: string
                format: binary
        '400':
          description: 'Bad request. Common causes: unknown variable name, constraint value

            out of range, malformed constraint syntax.

            '
        '404':
          description: Dataset not found.
  /griddap/{datasetID}.{fileType}:
    get:
      summary: Download a subset of a gridded dataset
      operationId: getGriddapData
      tags:
      - Data Access
      description: 'Retrieves satellite, model, or reanalysis data (CDM Grid type).


        **Query string structure:**

        `?var1[(d1_start):(d1_stop)][(d2_start):(d2_stop)],...`


        Dimension subscripts use parentheses for value-based indexing:

        `?sst[(2020-01-01T12:00:00Z)][(0.0)][(20.0):(50.0)][(-80.0):(-60.0)]`


        Stride syntax: `[(start):(stride):(stop)]`

        Select all values in a dimension: `[]`


        Dimensions are always in the order shown by `/info/{datasetID}/index.json`

        (typically time, altitude/depth, latitude, longitude for 4-D datasets).


        Always call `/info/{datasetID}/index.json` first to discover dimension

        names, their order, and valid ranges.

        '
      parameters:
      - name: datasetID
        in: path
        required: true
        schema:
          type: string
        example: erdMBsstd1day
      - name: fileType
        in: path
        required: true
        schema:
          $ref: '#/components/schemas/DataFileType'
      responses:
        '200':
          description: Gridded data subset in the requested format.
          content:
            application/x-netcdf:
              schema:
                type: string
                format: binary
            text/csv:
              schema:
                type: string
            application/json:
              schema:
                type: object
        '400':
          description: Bad request — unknown variable or out-of-range dimension subscript.
        '404':
          description: Dataset not found.
components:
  schemas:
    TabledapJsonResponse:
      type: object
      description: JSON response from a tabledap data request (same envelope as DatasetList).
      properties:
        table:
          type: object
          required:
          - columnNames
          - columnTypes
          - columnUnits
          - rows
          properties:
            columnNames:
              type: array
              items:
                type: string
            columnTypes:
              type: array
              items:
                type: string
            columnUnits:
              type: array
              items:
                type: string
                nullable: true
            rows:
              type: array
              items:
                type: array
                items: {}
    DataFileType:
      type: string
      description: Response format for tabledap and griddap data requests.
      enum:
      - csv
      - csvp
      - csv0
      - json
      - jsonlCSV1
      - jsonlCSV
      - jsonlKVP
      - tsv
      - tsvp
      - tsv0
      - nc
      - ncHeader
      - ncCF
      - ncCFHeader
      - ncCFMA
      - ncCFMAHeader
      - nccsv
      - nccsvMetadata
      - ncoJson
      - mat
      - asc
      - das
      - dds
      - dods
      - esriCsv
      - fgdc
      - geoJson
      - iso19115
      - itx
      - kml
      - odvTxt
      - smallPdf
      - pdf
      - largePdf
      - smallPng
      - png
      - largePng
      - transparentPng
      - wav
      - xhtml
      - html
      - dataTable
      - subset
      - graph