spatial.addWKTLayer

Procedure

Adds a new WKT layer with the given node property to hold the WKT string, returns the layer root node

Signature

spatial.addWKTLayer(name :: STRING, nodePropertyName :: STRING, indexConfig =  :: STRING) :: (node :: NODE)

Input parameters

Name Type Default Description

name

STRING

null

The name of the layer

nodePropertyName

STRING

null

The property from which the WKT will be read

indexConfig

STRING

""

The configuration of the newly created index

Output parameters

Name Type Description

node

NODE

Examples

Add a WKT geometry to a layer

CALL spatial.addWKTLayer('geom', 'wkt')
CALL spatial.addWKT('geom',"LINESTRING (15.2 60.1, 15.3 60.1)")
Table 1. Result
node 
( {
    bbox: [15.2,60.1,15.3,60.1],
    gtype: 2,
    wkt: "LINESTRING (15.2 60.1, 15.3 60.1)"
})
 
CALL spatial.closest('geom',{lon:15.2, lat:60.1}, 1.0)
Table 2. Result
node 
( {
    bbox: [15.2,60.1,15.3,60.1],
    gtype: 2,
    wkt: "LINESTRING (15.2 60.1, 15.3 60.1)"
})

Decode a geometry from a node property

Create a WKT layer
CALL spatial.addWKTLayer('geom','geom')
Table 3. Result
node 
(:SpatialLayer {
    geomencoder: "org.neo4j.gis.spatial.WKTGeometryEncoder",
    geomencoder_config: "geom",
    index_class: "org.neo4j.gis.spatial.index.LayerRTreeIndex",
    layer: "geom",
    layer_class: "org.neo4j.gis.spatial.EditableLayerImpl"
})
Decode a geometry
CREATE (n:Node {geom:'POINT(4.0 5.0)'}) RETURN spatial.decodeGeometry('geom',n) AS geometry
Table 4. Result
geometry

point({x: 4.0, y: 5.0, crs: 'cartesian'})