Spatial Search for Features

This section describes how to search for specific features in your space which are intersecting with a provided geometry.

A spatial search requires a Geometry as an input. One common use-case: find all Features which are around 1000 meters from a given Position. Another one could be: find all Features which are 100 meters beside a road.

You can realize that kind of spatial search by providing a Point or LineSting Geometry and a radius, indicated in meters, which gets applied to thicken the input Geometry.

Another common usecase is: find all Features which are belonging to a country. For this, you only need to provide the Polygon Geometry of the country.

All GeoJSON Geometry types are allowed as input [Point, MultiPoint, LineString, MultiLineString, Polygon, MultiPolygon].

Submitting Geometry via POST Request

The easiest way for providing a search Geometry is submitting it via a POST-Request.

Another way to provide a search Geometry is to read it from a existing Feature, which is stored in a Data Hub Space that you have access to. This is recommended if your search Geometry is very complex, or if you want to store frequently used Geometries for spatial searches.

You can combine the spatial search requests with defining:

  • radius - in meter to thicken the input Geometry
  • property search - add filter based on properties
  • tag search - add filter based on tags
  • selection - select properties which should exclusively get included in the response

Using Spatial GET-Requests

Request

Try in Swagger

Spatial-Search by referencing a position (lat,lon) & defining a radius indicated in meters:

GET /spaces/{spaceId}/spatial?lon={Longitude}&lat={Latitude}&radius={raduisInMeters}

Spatial-Search by referencing a Feature from a Data Hub Space:

GET /spaces/{spaceId}/spatial?refSpaceId={referencedSpace}&refFeatureId
={referencedFeatureId}

Response

{
    "type": "FeatureCollection",
    "features":
    [
        {
            "type": "Feature",
            "id": "BfiimUxHjj",
            "geometry":
            {
                "type": "Point",
                "coordinates":
                [
                    7.01,
                    50.03
                ]
            },
            "properties":
            {
                "name": "Anfield",
                "spaceId@ns:com:here:xyz":
                {
                    "createdAt": 1517504700726,
                    "updatedAt": 1517504700726,
                    "space": "x-demospace",
                    "tags":
                    [
                        "football",
                        "stadium"
                    ]
                },
                "amenity": "Football Stadium",
                "capacity": 54074,
                "popupContent": "Home of Liverpool Football Club"
            }
        }
    ]
}

Using Spatial POST-Request

Request

Try in Swagger

Spatial-Search by posting a Geometry:

POST /spaces/{spaceId}/spatial

with the following body

{
    "type": "MultiPolygon",
    "coordinates": [
        [
            [
                [
                    7,
                    50
                ],
                [
                    7.1,
                    50
                ],
                [
                    7.1,
                    50.1
                ],
                [
                    7,
                    50.1
                ],
                [
                    7,
                    50
                ]
            ],
            [
                [
                    7.05,
                    50.05
                ]
                [
                    7.05,
                    50.09
                ],
                [
                    7.09,
                    50.09
                ],
                [
                    7.09,
                    50.05
                ],
                [
                    7.05,
                    50.05
                ]
            ]
        ]
    ]
}

Response

{
    "type": "FeatureCollection",
    "features":
    [
        {
            "type": "Feature",
            "id": "BfiimUxHjj",
            "geometry":
            {
                "type": "Point",
                "coordinates":
                [
                    7.01,
                    50.03
                ]
            },
            "properties":
            {
                "name": "Anfield",
                "spaceId@ns:com:here:xyz":
                {
                    "createdAt": 1517504700726,
                    "updatedAt": 1517504700726,
                    "space": "x-demospace",
                    "tags": []
                    [
                        "football",
                        "stadium"
                    ]
                },
                "amenity": "Football Stadium",
                "capacity": 54074,
                "popupContent": "Home of Liverpool Football Club"
            }
        }
    ]
}

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