Department of Interior

aid: doi
name: Department of Interior
description: The U.S. Department of the Interior (DOI) manages and conserves federal lands and natural resources across America.
  DOI's bureaus and offices provide REST APIs and data services covering national park information, water resources, earthquake
  data, mineral resources, geospatial federal land boundaries, and wildlife data. Key API providers include the National Park
  Service (NPS), the U.S. Geological Survey (USGS), and the Bureau of Land Management (BLM).
accessModel:
  pricing: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/doi.png
url: https://raw.githubusercontent.com/api-evangelist/doi/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
type: Index
tags:
- Federal Government
- National Parks
- Federal Lands
- Water Resources
- Wildlife
- Minerals
- Geospatial
- Geology
- Native American Affairs
- Public Lands
apis:
- name: NPS Data API
  description: The National Park Service Data API provides authoritative data about NPS sites including parks, alerts, campgrounds,
    events, visitor centers, news releases, articles, and educational lesson plans. Access requires a free API key sent via
    HTTP request header.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - National Parks
  - Recreation
  - Federal Lands
  - Campgrounds
  - Events
  properties:
  - type: Documentation
    url: https://www.nps.gov/subjects/developer/api-documentation.htm
  - type: GettingStarted
    url: https://www.nps.gov/subjects/developer/get-started.htm
  - type: Authentication
    url: https://www.nps.gov/subjects/developer/api-guides.htm
  contact:
  - FN: National Park Service Developer Resources
    url: https://www.nps.gov/subjects/developer/index.htm
- name: USGS Earthquake Hazards Web Services
  description: Real-time earthquake data feeds, notifications, and web services providing access to seismic event data including
    location, magnitude, depth, and related hazard information. Supports GeoJSON, QuakeML, and CSV formats.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://earthquake.usgs.gov/fdsnws/event/1/
  baseURL: https://earthquake.usgs.gov/fdsnws/event/1
  tags:
  - Earthquakes
  - Seismic
  - Natural Hazards
  - Real-Time Data
  properties:
  - type: Documentation
    url: https://earthquake.usgs.gov/fdsnws/event/1/
  contact:
  - FN: USGS Earthquake Hazards Program
    url: https://earthquake.usgs.gov/
- name: USGS Mineral Resources Data API
  description: API access to the USGS Mineral Resources Data System (MRDS) and related mineral deposit databases. Supports
    geographic queries, bounding box searches, point queries, and access to data on mineral deposits, mining operations, and
    geochemical samples across the United States.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://mrdata.usgs.gov/catalog/api.php
  baseURL: https://mrdata.usgs.gov
  tags:
  - Minerals
  - Mining
  - Geochemistry
  - Natural Resources
  properties:
  - type: Documentation
    url: https://mrdata.usgs.gov/catalog/api.php
  contact:
  - FN: USGS Mineral Resources Program
    url: https://www.usgs.gov/programs/mineral-resources-program/data
- name: BLM GIS REST Services
  description: Bureau of Land Management geospatial REST services providing access to federal land status, cadastral data
    (Public Land Survey System), mineral rights boundaries, and other BLM-managed land data through ArcGIS REST service endpoints.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.blm.gov/services/geospatial/GISData
  baseURL: https://gis.blm.gov/arcgis/rest/services
  tags:
  - Geospatial
  - Federal Lands
  - Cadastral
  - GIS
  - Public Lands
  properties:
  - type: Documentation
    url: https://www.blm.gov/services/geospatial/GISData
  contact:
  - FN: Bureau of Land Management Geospatial
    url: https://www.blm.gov/services/geospatial
- name: USGS ScienceBase API
  description: ScienceBase provides collaborative scientific data management infrastructure enabling upload, documentation,
    sharing, and discovery of USGS scientific data using standards-compliant REST web services. Covers a broad range of earth
    science, ecology, and natural resource data.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.sciencebase.gov/catalog/
  baseURL: https://www.sciencebase.gov/catalog
  tags:
  - Science Data
  - Ecology
  - Natural Resources
  - Data Catalog
  properties:
  - type: Documentation
    url: https://www.usgs.gov/sciencebase-instructions-and-documentation/api-and-web-services
  contact:
  - FN: USGS ScienceBase
    url: https://www.sciencebase.gov
- aid: doi:doi-agency-codes-api
  name: Department of Interior agency-codes API
  description: Code identifying the agency or organization used for site information, data sources, and permitting agencies.
    Agency codes are fixed values assigned by the National Water Information System (NWIS).
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - agency-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-agency-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-altitude-datums-api
  name: Department of Interior altitude-datums API
  description: The recommended vertical datum is NAVD88 (North American Vertical Datum of 1988) where applicable as stated
    in Office of Information Technical Memo 2002.01. NGVD29 (National Geodetic Vertical Datum of 1929) and NAVD88 are the
    only datums that can be converted on output. NWIS uses the North American Vertical Datum Conversions (VERTCON) of the
    National Geodetic Survey to convert from NGVD29 to NAVD88 or vice versa. Conversions to or from other vertical datums
    are not available.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - altitude-datums
  properties:
  - type: OpenAPI
    url: openapi/doi-altitude-datums-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-aquifer-codes-api
  name: Department of Interior aquifer-codes API
  description: Local aquifers in USGS data are identified by an aquifer name and 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).
    For the age of formation (aquifer age), generally the smaller the number represents the younger the geohydrologic unit.
    Aquifer names and the definition of an aquifer can be very subjective. One rock unit may be called different aquifer names
    by different people. Local aquifers and layered aquifers are often grouped into larger named regional aquifers or aquifer
    systems. For example, the National Northern Atlantic Coastal Plain aquifer system (National aquifer) consists of five
    layered regional aquifers. Each regional aquifer is divided into two or more aquifers which may have a different name
    in each of the states in which the aquifer is found.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - aquifer-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-aquifer-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-aquifer-types-api
  name: Department of Interior aquifer-types API
  description: Groundwater occurs in aquifers under two different conditions. Where water only partly fills an aquifer, the
    upper surface is free to rise and decline. These aquifers are referred to as unconfined (or water-table) aquifers. Where
    water completely fills an aquifer that is overlain by a confining bed, the aquifer is referred to as a confined (or artesian)
    aquifer. When a confined aquifer is penetrated by a well, the water level in the well will rise above the top of the aquifer
    (but not necessarily above land surface).
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - aquifer-types
  properties:
  - type: OpenAPI
    url: openapi/doi-aquifer-types-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-channel-measurements-api
  name: Department of Interior channel-measurements API
  description: Channel measurements taken as part of streamflow field measurements.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - channel-measurements
  properties:
  - type: OpenAPI
    url: openapi/doi-channel-measurements-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-citations-api
  name: Department of Interior citations API
  description: Citations associated with water measurement methods.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - citations
  properties:
  - type: OpenAPI
    url: openapi/doi-citations-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-combined-metadata-api
  name: Department of Interior combined-metadata API
  description: This endpoint combines metadata from timeseries and field measurements collections by site.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - combined-metadata
  properties:
  - type: OpenAPI
    url: openapi/doi-combined-metadata-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-continuous-api
  name: Department of Interior continuous API
  description: Continuous data are collected via automated sensors installed at a monitoring location. They are collected
    at a high frequency and often at a fixed 15-minute interval. Depending on the specific monitoring location, the data may
    be transmitted automatically via telemetry and be available on WDFN within minutes of collection, while other times the
    delivery of data may be delayed if the monitoring location does not have the capacity to automatically transmit data.
    Continuous data are described by parameter name and parameter code (pcode). These data might also be referred to as "instantaneous
    values" or "IV".
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - continuous
  properties:
  - type: OpenAPI
    url: openapi/doi-continuous-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-coordinate-accuracy-codes-api
  name: Department of Interior coordinate-accuracy-codes API
  description: Appropriate code on the schedule to indicate the accuracy of the latitude-longitude values.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - coordinate-accuracy-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-coordinate-accuracy-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-coordinate-datum-codes-api
  name: Department of Interior coordinate-datum-codes API
  description: Horizontal datum code for the latitude/longitude coordinates. There are currently more than 300 horizontal
    datums available for entry.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - coordinate-datum-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-coordinate-datum-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-coordinate-method-codes-api
  name: Department of Interior coordinate-method-codes API
  description: Methods used to determine latitude-longitude values.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - coordinate-method-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-coordinate-method-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-counties-api
  name: Department of Interior counties API
  description: The name of the county or county equivalent (parish, borough, planning reagion, etc.) in which the site is
    located. List includes Census Bureau FIPS county codes, names and associated Country and State.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - counties
  properties:
  - type: OpenAPI
    url: openapi/doi-counties-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-countries-api
  name: Department of Interior countries API
  description: FIPS country codes and names.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - countries
  properties:
  - type: OpenAPI
    url: openapi/doi-countries-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-daily-api
  name: Department of Interior daily API
  description: Daily data provide one data value to represent water conditions for the day. Throughout much of the history
    of the USGS, the primary water data available was daily data collected manually at the monitoring location once each day.
    With improved availability of computer storage and automated transmission of data, the daily data published today are
    generally a statistical summary or metric of the continuous data collected each day, such as the daily mean, minimum,
    or maximum value. Daily data are automatically calculated from the continuous data of the same parameter code and are
    described by parameter code and a statistic code. These data have also been referred to as “daily values” or “DV”.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - daily
  properties:
  - type: OpenAPI
    url: openapi/doi-daily-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-field-measurements-api
  name: Department of Interior field-measurements API
  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.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - field-measurements
  properties:
  - type: OpenAPI
    url: openapi/doi-field-measurements-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-field-measurements-metadata-api
  name: Department of Interior field-measurements-metadata API
  description: This endpoint provides metadata about field measurement collections, including when the earliest and most recent
    observations for a parameter occurred at a monitoring location and its units.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - field-measurements-metadata
  properties:
  - type: OpenAPI
    url: openapi/doi-field-measurements-metadata-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-hydrologic-unit-codes-api
  name: Department of Interior hydrologic-unit-codes API
  description: 'Hydrologic units are geographic areas representing part or all of a surface drainage basin or distinct hydrologic
    feature identified by a unique number (HUC), and a name. The United States is divided and sub-divided into successively
    smaller hydrologic units which are classified into four levels: regions, sub-regions, accounting units, and cataloging
    units. Each unit consists of two to eight digits based on the four levels of classification in the hydrologic unit system.
    Additional information can be found at &lthttps://water.usgs.gov/GIS/huc.html&gt.'
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - hydrologic-unit-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-hydrologic-unit-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-latest-continuous-api
  name: Department of Interior latest-continuous API
  description: This endpoint provides the most recent observation for each time series of continuous data. Continuous data
    are collected via automated sensors installed at a monitoring location. They are collected at a high frequency and often
    at a fixed 15-minute interval. Depending on the specific monitoring location, the data may be transmitted automatically
    via telemetry and be available on WDFN within minutes of collection, while other times the delivery of data may be delayed
    if the monitoring location does not have the capacity to automatically transmit data. Continuous data are described by
    parameter name and parameter code. These data might also be referred to as "instantaneous values" or "IV"
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - latest-continuous
  properties:
  - type: OpenAPI
    url: openapi/doi-latest-continuous-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-latest-daily-api
  name: Department of Interior latest-daily API
  description: Daily data provide one data value to represent water conditions for the day. Throughout much of the history
    of the USGS, the primary water data available was daily data collected manually at the monitoring location once each day.
    With improved availability of computer storage and automated transmission of data, the daily data published today are
    generally a statistical summary or metric of the continuous data collected each day, such as the daily mean, minimum,
    or maximum value. Daily data are automatically calculated from the continuous data of the same parameter code and are
    described by parameter code and a statistic code. These data have also been referred to as “daily values” or “DV”.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - latest-daily
  properties:
  - type: OpenAPI
    url: openapi/doi-latest-daily-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-latest-field-measurements-api
  name: Department of Interior latest-field-measurements API
  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.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - latest-field-measurements
  properties:
  - type: OpenAPI
    url: openapi/doi-latest-field-measurements-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-medium-codes-api
  name: Department of Interior medium-codes API
  description: Medium refers to the specific environmental medium from which the sample was collected. Medium type differs
    from site type because one site type, such as surface water, could have data for several media, such as water, bottom
    sediment, fish tissue, and others.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - medium-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-medium-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-method-categories-api
  name: Department of Interior method-categories API
  description: Categorical standards for methods describing the associated data's appropriateness for an intended use.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - method-categories
  properties:
  - type: OpenAPI
    url: openapi/doi-method-categories-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-method-citations-api
  name: Department of Interior method-citations API
  description: Citation identifiers for water measurement methods.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - method-citations
  properties:
  - type: OpenAPI
    url: openapi/doi-method-citations-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-methods-api
  name: Department of Interior methods API
  description: Water measurement or water-quality analytical methods. Codes and descriptions defining a method for calculating
    or measuring the value of a water quality or quantity parameter. Method codes are associated with one or many parameter
    codes.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - methods
  properties:
  - type: OpenAPI
    url: openapi/doi-methods-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-monitoring-locations-api
  name: Department of Interior monitoring-locations API
  description: Location information is basic information about the monitoring location including the name, identifier, agency
    responsible for data collection, and the date the location was established. It also includes information about the type
    of location, such as stream, lake, or groundwater, and geographic information about the location, such as state, county,
    latitude and longitude, and hydrologic unit code (HUC).
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - monitoring-locations
  properties:
  - type: OpenAPI
    url: openapi/doi-monitoring-locations-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-national-aquifer-codes-api
  name: Department of Interior national-aquifer-codes API
  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.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - national-aquifer-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-national-aquifer-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-parameter-codes-api
  name: Department of Interior parameter-codes API
  description: 'Parameter codes are 5-digit codes and associated descriptions used to identify the constituent measured and
    the units of measure. Some parameter code definitions include information about the sampling matrix, fraction, and methods
    used to measure the constituent. Some parameters are fixed-value (fxd) numeric codes having textual meaning (for example:
    parameter code 00041 is a weather code parameter, code of 60 means rain), but more commonly represent a numeric value
    for chemical, physical, or biological data.'
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - parameter-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-parameter-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-peaks-api
  name: Department of Interior peaks API
  description: Annual peak flow values are the maximum instantaneous streamflow values recorded at a particular site for the
    entire water year from October 1 to September 30. Note that the annual peak flow value may not occur at the same time
    the maximum water level occurs due to conditions such as backwater, tidal fluctuations, etc.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - peaks
  properties:
  - type: OpenAPI
    url: openapi/doi-peaks-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-reliability-codes-api
  name: Department of Interior reliability-codes API
  description: Code indicating the reliability of the data available for the site.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - reliability-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-reliability-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-server-api
  name: Department of Interior server API
  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.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - server
  properties:
  - type: OpenAPI
    url: openapi/doi-server-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-site-types-api
  name: Department of Interior site-types API
  description: The hydrologic cycle setting or a man-made feature thought to affect the hydrologic conditions measured at
    a site. Primary and secondary site types associated with data collection sites. All sites have a primary site type, and
    may additionally have a secondary site type that further describes the location.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - site-types
  properties:
  - type: OpenAPI
    url: openapi/doi-site-types-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-states-api
  name: Department of Interior states API
  description: State name or territory. Includes U.S. states and foreign entities classified under FIPS as 'Principal Administrative
    Divisions'.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - states
  properties:
  - type: OpenAPI
    url: openapi/doi-states-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-statistic-codes-api
  name: Department of Interior statistic-codes API
  description: Statistic codes.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - statistic-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-statistic-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-time-series-metadata-api
  name: Department of Interior time-series-metadata API
  description: Daily data and continuous measurements are grouped into time series, which represent a collection of observations
    of a single parameter, potentially aggregated using a standard statistic, at a single monitoring location. This endpoint
    provides metadata about those time series, including their operational thresholds, units of measurement, and when the
    earliest and most recent observations in a time series occurred.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - time-series-metadata
  properties:
  - type: OpenAPI
    url: openapi/doi-time-series-metadata-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.usgs.gov/docs/ogcapi/migration/
- aid: doi:doi-time-zone-codes-api
  name: Department of Interior time-zone-codes API
  description: The ISO 8601 standard defines time zone offsets as a numerical value added to a local time to convert it to
    Coordinated Universal Time (UTC), either as +hh:mm or -hh:mm, or represented by the letter Z to explicitly indicate UTC.
    For example, +05:30 means 5 hours and 30 minutes ahead of UTC, while -08:00 means 8 hours behind UTC. The offset Z specifically
    signifies UTC.
  humanURL: https://www.nps.gov/subjects/developer/index.htm
  baseURL: https://developer.nps.gov/api/v1
  tags:
  - time-zone-codes
  properties:
  - type: OpenAPI
    url: openapi/doi-time-zone-codes-api-openapi.yml
  - type: Documentation
    url: https://api.waterdata.usgs.gov/docs/
  - type: Migration
    url: https://api.waterdata.u

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