---
title: "Fetch features"
method: GET
path: "/collections/{collectionId}/items"
tags: ["Data"]
---

# Fetch features

`GET /collections/{collectionId}/items`

Fetch features of the feature collection with id `collectionId`.

Every feature in a dataset belongs to a collection. A dataset may consist of multiple feature collections. A feature collection is often a collection of features of a similar type, based on a common schema.

Use content negotiation to request HTML or GeoJSON.

## Path parameters

- `collectionId` string, required

## Query parameters

- `limit` integer — The `limit` parameter limits the number of results that are included in the response. To retrieve the next bunch of result, use the `next` link in the `links` section of the response. Minimum = 1. Maximum = 100. Default = 100.
- `bbox` number[] — The bounding box is provided as four numbers: * Lower left corner, coordinate axis 1 * Lower left corner, coordinate axis 2 * Upper right corner, coordinate axis 1 * Upper right corner, coordinate axis 2 The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84). For WGS84 longitude/latitude the values are in most cases the sequence of minimum longitude, minimum latitude, maximum longitude and maximum latitude. However, in cases where the box spans the antimeridian the first value (west-most box edge) is larger than the third value (east-most box edge). Example: The bounding box of Switzerland in WGS 84 (from 5.96°E to 10.49°E and from 45.82°N to 47.81°N) would be represented in JSON as `[5.96, 45.82, 10.49, 47.81]` and in a query as `bbox=5.96,45.82,10.49,47.81`."
- `datetime` string — Either a date-time or an interval, open or closed. Date and time expressions adhere to RFC 3339. Open intervals are expressed using double-dots. Examples: * A date-time: "2018-02-12T23:20:50Z" * A closed interval: "2018-02-12T00:00:00Z/2018-03-18T12:31:12Z" * Open intervals: "2018-02-12T00:00:00Z/.." or "../2018-03-18T12:31:12Z" Only features that have a temporal property that intersects the value of `datetime` are selected. When used as URL query argument, the value must be correctly url-encoded.

## Response `200`

The response is a document consisting of features in the collection. The features included in the response are determined by the server based on the query parameters of the request. To support access to larger collections without overloading the client, the API supports paged access with links to the next page, if more features are selected that the page size.

The `bbox` and `datetime` parameter can be used to select only a subset of the features in the collection (the features that are in the bounding box or time interval). The `bbox` parameter matches all features in the collection that are not associated with a location, too. The `datetime` parameter matches all features in the collection that are not associated with a time stamp or interval, too.

The `limit` parameter may be used to control the subset of the selected features that should be returned in the response, the page size. Each page include links to support paging (link relation `next` and/or `previous`).

- Items — A FeatureCollection augmented with foreign members that contain values relevant to a STAC entity
  - `features` Item[], required
    - `id` string, required — Feature identifier (unique per collection)
    - `links` Link[], required
      - `href` string, url, required
      - `rel` string, required — Relationship between the current document and the linked document. NOTE: the following relations are reserved and automatically generated: `self`, `root`, `parent`, `items`, `collection`, `next`, `previous`
      - `title` string
      - `type` string — The media type of the link target
      - `method` 'GET' | 'POST' — Specifies the HTTP method that the link expects
      - `hreflang` string — The language of the link target
    - `assets` ItemAssets, required — List of Assets attached to this feature.
    - `bbox` number[], required — The bounding box is provided as four numbers: * Lower left corner, coordinate axis 1 * Lower left corner, coordinate axis 2 * Upper right corner, coordinate axis 1 * Upper right corner, coordinate axis 2 The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84). For WGS84 longitude/latitude the values are in most cases the sequence of minimum longitude, minimum latitude, maximum longitude and maximum latitude. However, in cases where the box spans the antimeridian the first value (west-most box edge) is larger than the third value (east-most box edge). Example: The bounding box of Switzerland in WGS 84 (from 5.96°E to 10.49°E and from 45.82°N to 47.81°N) would be represented in JSON as `[5.96, 45.82, 10.49, 47.81]` and in a query as `bbox=5.96,45.82,10.49,47.81`."
    - `geometry` union, required
      - GeoJsonPoint
        - `type` 'Point', required
        - `coordinates` number[], required — For type "Point", the "coordinates" member is a single position. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
      - GeoJsonLineString
        - `type` 'LineString', required
        - `coordinates` array[], required — For type "LineString", the "coordinates" member is an array of two or more positions. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
          - number[]
      - GeoJsonPolygon
        - `type` 'Polygon', required
        - `coordinates` array[], required — For type "Polygon", the "coordinates" member MUST be an array of linear ring coordinate arrays. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
          - array[]
            - number[]
      - GeoJsonMultiPoint
        - `type` 'MultiPoint', required
        - `coordinates` array[], required — For type "MultiPoint", the "coordinates" member is an array of positions. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
          - number[]
      - GeoJsonMultiLineString
        - `type` 'MultiLineString', required
        - `coordinates` array[], required — For type "MultiLineString", the "coordinates" member is an array of LineString coordinate arrays. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
          - array[]
            - number[]
      - GeoJsonMultiPolygon
        - `type` 'MultiPolygon', required
        - `coordinates` array[], required — For type "MultiPolygon", the "coordinates" member is an array of Polygon coordinate arrays. The coordinate reference system of the values is WGS84 longitude/latitude (http://www.opengis.net/def/crs/OGC/1.3/CRS84).
          - array[]
            - array[]
              - …
    - `properties` ItemProperties, required — Provides the core metadata fields plus extensions The item's data timing information can be specified either with * One datetime value in the field `datetime` * A datetime range with a `start_datetime` and an `end_datetime` One of the two is required. **Note on STAC extensions:** When a STAC extension is listed in the `stac_extensions` field, certain properties may be required. For example, when using the [Forecast extension](`https://github.com/stac-extensions/forecast`), the `forecast:reference_datetime` property is required.
      - `created` string, date-time, required — RFC 3339 compliant datetime string, time when the object was created
      - `datetime` string, date-time — RFC 3339 compliant datetime string
      - `start_datetime` string, date-time — RFC 3339 compliant datetime string
      - `end_datetime` string, date-time — RFC 3339 compliant datetime string
      - `expires` string, date-time — RFC 3339 compliant datetime string
      - `updated` string, date-time, required — RFC 3339 compliant datetime string, time when the object was updated
      - `title` string — Human readable title of the Feature
      - `forecast:reference_datetime` string, date-time — RFC 3339 compliant datetime string
      - `forecast:horizon` string — ISO 8601 compliant duration
      - `forecast:duration` string — ISO 8601 compliant duration
      - `forecast:variable` string, nullable — Name of the model variable that corresponds to the data. The variables should correspond to the [CF Standard Names](https://cfconventions.org/Data/cf-standard-names/current/build/cf-standard-name-table.html), e.g. `air_temperature` for the air temperature.
      - `forecast:perturbed` boolean, nullable — Denotes whether the data corresponds to the control run (`false`) or perturbed runs (`true`). The property needs to be specified in both cases as no default value is specified and as such the meaning is "unknown" in case it's missing.
    - `stac_version` string, required
    - `stac_extensions` string[] — List of STAC extensions used by this feature. Properties that are not part of the default feature properties (`datetime`, `start_datetime`, `end_datetime`, `title`, `created`, `updated`) must be covered by one of the extensions listed here, otherwise the request is rejected. Additionally, when an extension is listed here, certain properties required by that extension must be present in the `properties` field. For example, when using the Forecast extension, the `forecast:reference_datetime` property is required.
    - `type` 'Feature', required — The GeoJSON type
  - `links` Link[]
    - `href` string, url, required
    - `rel` string, required — Relationship between the current document and the linked document. NOTE: the following relations are reserved and automatically generated: `self`, `root`, `parent`, `items`, `collection`, `next`, `previous`
    - `title` string
    - `type` string — The media type of the link target
    - `method` 'GET' | 'POST' — Specifies the HTTP method that the link expects
    - `hreflang` string — The language of the link target
  - `type` 'FeatureCollection', required

## Other responses

- `400` — A query parameter has an invalid value.
- `404` — The specified resource/URI was not found
- `500` — The request was syntactically and semantically valid, but an error occurred while trying to act upon it

---

[API](https://skmtc.net/geoadmin/apis/the-spatiotemporal-asset-catalog-api-for-data-geo-admin-ch.md) · [All operations](https://skmtc.net/geoadmin/apis/the-spatiotemporal-asset-catalog-api-for-data-geo-admin-ch/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/geoadmin/the-spatiotemporal-asset-catalog-api-for-data-geo-admin-ch/versions/015864bb4d77/schema)