{ "collections":[ { "id":"latest-continuous", "title":"Latest continuous", "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\"\n", "keywords":[ "data", "automated", "subhourly", "measured", "computed", "current", "single location", "features", "latest" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-continuous/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"continuous", "title":"Continuous values", "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\".\n", "keywords":[ "data", "automated", "subhourly", "measured", "computed", "current", "single location", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/continuous/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"daily", "title":"Daily values", "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 \u201cdaily values\u201d or \u201cDV\u201d.\n", "keywords":[ "automated", "daily", "statistics", "current", "single location", "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/daily/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"latest-daily", "title":"Latest daily values", "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 \u201cdaily values\u201d or \u201cDV\u201d.\n", "keywords":[ "automated", "daily", "statistics", "current", "single location", "data", "features", "latest" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/latest-daily/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"field-measurements", "title":"Field measurements", "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.\n", "keywords":[ "data", "manual", "periodic", "subhourly", "irregular", "measured", "computed", "current", "single location", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"channel-measurements", "title":"Channel measurements", "description":"Channel measurements taken as part of streamflow field measurements.\n", "keywords":[ "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"combined-metadata", "title":"Combined metadata", "description":"This endpoint combines metadata from timeseries and field measurements collections by site.\n", "keywords":[ "current", "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/combined-metadata/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"field-measurements-metadata", "title":"Field measurements metadata", "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.\n", "keywords":[ "current", "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/field-measurements-metadata/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"time-series-metadata", "title":"Time series metadata", "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.\n", "keywords":[ "current", "single location", "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/time-series-metadata/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"monitoring-locations", "title":"Monitoring locations", "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).\n", "keywords":[ "single location", "measured", "computed", "current", "data", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/monitoring-locations/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ], "trs":"http://www.opengis.net/def/uom/ISO-8601/0/Gregorian" } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84", "http://www.opengis.net/def/crs/OGC/1.3/CRS83", "http://www.opengis.net/def/crs/OGC/1.3/CRS27" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"agency-codes", "title":"Agency codes", "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).\n", "keywords":[ "metadata", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ] } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"altitude-datums", "title":"Altitude datums", "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.\n", "keywords":[ "metadata", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ] } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"aquifer-codes", "title":"Aquifer codes", "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.\n", "keywords":[ "metadata", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ] } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"aquifer-types", "title":"Aquifer types", "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).\n", "keywords":[ "metadata", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-types?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-types?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", 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Additional information can be found at .\n", "keywords":[ "metadata", "features" ], "links":[ { "type":"application/json", "rel":"root", "title":"The landing page of this server as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=json" }, { "type":"text/html", "rel":"root", "title":"The landing page of this server as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0?f=html" }, { "type":"application/json", "rel":"self", "title":"This document as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes?f=json" }, { "type":"application/ld+json", "rel":"alternate", "title":"This document as RDF (JSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes?f=jsonld" }, { "type":"text/html", "rel":"alternate", "title":"This document as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/schema?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/schema", "title":"Schema of collection in HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/schema?f=html" }, { "type":"application/schema+json", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as JSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/queryables?f=json" }, { "type":"text/html", "rel":"http://www.opengis.net/def/rel/ogc/1.0/queryables", "title":"Queryables for this collection as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/queryables?f=html" }, { "type":"application/geo+json", "rel":"items", "title":"Items as GeoJSON", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/items?f=json" }, { "type":"application/ld+json", "rel":"items", "title":"Items as RDF (GeoJSON-LD)", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/items?f=jsonld" }, { "type":"text/html", "rel":"items", "title":"Items as HTML", "href":"https://api.waterdata.usgs.gov/ogcapi/v0/collections/hydrologic-unit-codes/items?f=html" } ], "extent":{ "spatial":{ "bbox":[ [ -180, -90, 180, 90 ] ], "crs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, "temporal":{ "interval":[ [ null, null ] ] } }, "itemType":"feature", "crs":[ "http://www.opengis.net/def/crs/OGC/1.3/CRS84" ], "storageCrs":"http://www.opengis.net/def/crs/OGC/1.3/CRS84" }, { "id":"medium-codes", "title":"Medium codes", "description":"Medium refers to the specific environmental medium from which the sample was collected. 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