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API Reference
Datasets

Query features in a dataset

FeatureCollection Datasets.Features(DatasetFeaturesParamsparameters, CancellationTokencancellationToken = default)
GET/api/v1/datasets/{id}/features

Query features in a dataset

ParametersExpand Collapse
DatasetFeaturesParams parameters
required string id

Dataset ID

string cursor

Cursor for pagination

string format

Response format: json (default), geojson, csv, ndjson

Long limit

Maximum results

Double outputBuffer

Buffer geometry by meters

Boolean outputCentroid

Replace geometry with centroid

string outputFields

Comma-separated property fields to include

Boolean outputGeometry

Include geometry (default true)

string outputInclude

Extra computed fields: bbox, distance, center

Long outputPrecision

Coordinate decimal precision (1-15, default 7)

Double outputSimplify

Simplify geometry tolerance in meters

string outputSort

Sort by: distance, name, osm_id

ReturnsExpand Collapse
class FeatureCollection:

GeoJSON FeatureCollection (RFC 7946). For paginated endpoints, metadata is returned in HTTP response headers rather than the body:

Header Description
X-Limit Requested result limit
X-Has-More true if more results exist
X-Next-Cursor Opaque cursor for next page (cursor pagination)
X-Next-Offset Numeric offset for next page (offset pagination)
Link RFC 8288 rel="next" link to the next page

Content-Type is application/geo+json.

required IReadOnlyList<GeoJsonFeature> Features

Array of GeoJSON Feature objects

required GeoJsonGeometry Geometry

GeoJSON Geometry object per RFC 7946. Coordinates use [longitude, latitude] order. 3D coordinates [lng, lat, elevation] are used for elevation endpoints.

required Coordinates Coordinates

Coordinates array. Nesting depth varies by geometry type: Point = [lng, lat], LineString = [[lng, lat], ...], Polygon = [[[lng, lat], ...], ...], etc.

One of the following:
IReadOnlyList<Double>
IReadOnlyList<IReadOnlyList<Double>>
IReadOnlyList<IReadOnlyList<IReadOnlyList<Double>>>
IReadOnlyList<IReadOnlyList<IReadOnlyList<IReadOnlyList<Double>>>>
required Type Type

Geometry type

One of the following:
"Point"Point
"LineString"LineString
"Polygon"Polygon
"MultiPoint"MultiPoint
"MultiLineString"MultiLineString
"MultiPolygon"MultiPolygon
required IReadOnlyDictionary<string, JsonElement> Properties

OSM tags flattened as key-value pairs, plus @type (node/way/relation) and @id (OSM ID) metadata fields. May include distance_m for proximity queries.

required Type Type

Always Feature

string ID

Compound identifier in type/osm_id format

required Type Type

Always FeatureCollection

Query features in a dataset

DatasetFeaturesParams parameters = new() { ID = "id" };

var featureCollection = await client.Datasets.Features(parameters);

Console.WriteLine(featureCollection);
{
  "features": [
    {
      "geometry": {
        "coordinates": [
          2.3522,
          48.8566
        ],
        "type": "Point"
      },
      "properties": {
        "@id": "bar",
        "@type": "bar",
        "amenity": "bar",
        "cuisine": "bar",
        "name": "bar"
      },
      "type": "Feature",
      "id": "node/21154906"
    }
  ],
  "type": "FeatureCollection"
}
Returns Examples
{
  "features": [
    {
      "geometry": {
        "coordinates": [
          2.3522,
          48.8566
        ],
        "type": "Point"
      },
      "properties": {
        "@id": "bar",
        "@type": "bar",
        "amenity": "bar",
        "cuisine": "bar",
        "name": "bar"
      },
      "type": "Feature",
      "id": "node/21154906"
    }
  ],
  "type": "FeatureCollection"
}