spatial.closest

Procedure

Finds all geometry nodes in the layer within the distance to the given coordinate

Signature

spatial.closest(layerName :: STRING, coordinate :: ANY, distanceInKm :: FLOAT) :: (node :: NODE)

Input parameters

Name Type Default Description

layerName

STRING

null

The name of the layer

coordinate

ANY

null

A valid value for the coordinate is a:

  • JTS Coordinate

  • Neo4j Coordinate

  • Neo4j Point

  • Map with keys 'latitude' and 'longitude'

  • Map with keys 'lat' and 'lon'"

  • Node or Relationship with properties 'latitude' and 'longitude'

  • Node or Relationship with properties 'lat' and 'lon'

distanceInKm

FLOAT

null

The distance in kilometers within which to search for geometries

Output parameters

Name Type Description

node

NODE

Examples

Add multiple WKT geometries to a layer

CALL spatial.addLayer('geom','geohash','lon:lat')
CALL spatial.addWKTs('geom',["POINT (15.2 60.1)","POINT (25.2 30.1)"])
Table 1. Result
node 
( {
    bbox: [15.2,60.1,15.2,60.1],
    gtype: 1,
    lat: 60.1,
    lon: 15.2
})
 
( {
    bbox: [25.2,30.1,25.2,30.1],
    gtype: 1,
    lat: 30.1,
    lon: 25.2
})
 
CALL spatial.closest('geom',{lon:15.0, lat:60.0}, 1.0)
Table 2. Result
node 
( {
    bbox: [15.2,60.1,15.2,60.1],
    gtype: 1,
    lat: 60.1,
    lon: 15.2
})