spatial.addPointLayer

Procedure

Adds a new simple point layer, returns the layer root node

Signature

spatial.addPointLayer(name :: STRING, indexType = rtree :: STRING, crsName =  :: STRING, indexConfig =  :: STRING) :: (node :: NODE)

Input parameters

Name Type Default Description

name

STRING

null

The name of the layer

indexType

STRING

"rtree"

The type of the new layer. Existing layer types can be queried by spatial.layer

crsName

STRING

""

The CRS to be used, valid values are: wgs84

indexConfig

STRING

""

The configuration of the newly created index

Output parameters

Name Type Description

node

NODE

Examples

Create a layer to index a node

CALL spatial.addPointLayer('my-simple-rtree-layer')
Table 1. Result
node 
(:SpatialLayer {
    geomencoder: "org.neo4j.gis.spatial.encoders.SimplePointEncoder",
    index_class: "org.neo4j.gis.spatial.index.LayerRTreeIndex",
    layer: "my-simple-rtree-layer",
    layer_class: "org.neo4j.gis.spatial.SimplePointLayer"
})

Create a node to index

CREATE (n:Node {id: 42, latitude:60.1,longitude:15.2}) SET n.location=point(n) RETURN n

Index node

MATCH (n:Node) WITH n CALL spatial.addNode('my-simple-rtree-layer',n) YIELD node RETURN node
Table 2. Result
node 
(:Node {
    bbox: [ 15.2, 60.1, 15.2, 60.1 ],
    gtype: 1,
    id: 42,
    latitude: 60.1,
    location: point({x: 15.2, y: 60.1, crs: 'wgs-84'}),
    longitude: 15.2
})

Find node within distance

CALL spatial.withinDistance('my-simple-rtree-layer',{lon:15.0,lat:60.0},100)
Table 3. Result
distance node 
15.713441434310283
 
(:Node {
    bbox: [ 15.2, 60.1, 15.2, 60.1 ],
    gtype: 1,
    id: 42,
    latitude: 60.1,
    location: point({x: 15.2, y: 60.1, crs: 'wgs-84'}),
    longitude: 15.2
})