spatial.addNativePointLayer

Procedure

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

Signature

spatial.addNativePointLayer(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 index algorithm to be used, valid values are: rtree, geohash, zorder or hilbert

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.addNativePointLayer('my-native-rtree-layer')
Table 1. Result
node 
(:SpatialLayer {
    geomencoder: "org.neo4j.gis.spatial.encoders.NativePointEncoder",
    index_class: "org.neo4j.gis.spatial.index.LayerRTreeIndex",
    layer: "my-native-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-native-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-native-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
})