generated: '2026-08-20'
method: probed
source: https://api.waterdata.usgs.gov/ogcapi/v0/conformance
note: >-
  Fetched anonymously with HTTP 200 on 2026-08-20 from the API's own /conformance
  endpoint. These are the classes the service declares about itself — first-party,
  not inferred from documentation.
standards:
- id: ogc-api
  conforms: true
  evidence: >-
    /conformance declares OGC API - Common Part 1 (core, landing-page, json, html, oas30)
    and Part 2 (collections), retrieved live 2026-08-20.
- id: ogc-api-features
  conforms: true
  evidence: >-
    Declares OGC API - Features Part 1 (core, geojson, html, oas30), Part 2 (crs),
    Part 3 (queryables, queryables-query-parameters) and Part 4 (create-replace-delete).
- id: cql2
  conforms: true
  evidence: Declares cql2/1.0/conf/basic-cql2 and cql2/1.0/conf/cql2-text.
- id: openapi
  conforms: true
  evidence: >-
    OpenAPI 3.0.2 served live and anonymously at /openapi?f=json — 184 paths,
    220 operations, "USGS Water Data APIs" v0.71.7.
- id: geojson
  conforms: true
  evidence: Declares ogcapi-features-1/1.0/conf/geojson; collection items return GeoJSON.
conformsTo:
- http://www.opengis.net/spec/cql2/1.0/conf/basic-cql2
- http://www.opengis.net/spec/cql2/1.0/conf/cql2-text
- http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/core
- http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/html
- http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/json
- http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/landing-page
- http://www.opengis.net/spec/ogcapi-common-1/1.0/conf/oas30
- http://www.opengis.net/spec/ogcapi-common-2/1.0/conf/collections
- http://www.opengis.net/spec/ogcapi-common-3/1.0/conf/advanced-property-roles
- http://www.opengis.net/spec/ogcapi-common-3/1.0/conf/schemas
- http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/core
- http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/geojson
- http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/html
- http://www.opengis.net/spec/ogcapi-features-1/1.0/conf/oas30
- http://www.opengis.net/spec/ogcapi-features-2/1.0/conf/crs
- http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/queryables
- http://www.opengis.net/spec/ogcapi-features-3/1.0/conf/queryables-query-parameters
- http://www.opengis.net/spec/ogcapi-features-4/1.0/conf/create-replace-delete