spatial.getFeatureCount

Procedure

Returns the number of features in the layer

Signature

spatial.getFeatureCount(name :: STRING) :: (count :: INTEGER)

Input parameters

Name Type Default Description

name

STRING

null

The name of the layer

Output parameters

Name Type Description

count

INTEGER

Examples

Count features in different layer types

Create a point layer

CALL spatial.addPointLayer('count_layer')

Count features in empty layer

CALL spatial.getFeatureCount('count_layer') YIELD count
Table 1. Result
count 
0

Add one node to the layer

CREATE (n:Node {latitude: 60.1, longitude: 15.2, name: 'first'})
WITH n
CALL spatial.addNode('count_layer', n) YIELD node
RETURN node

Count after adding one feature

CALL spatial.getFeatureCount('count_layer') YIELD count
Table 2. Result
count 
1

Add multiple nodes at once

UNWIND range(1,3) as i
CREATE (n:Node {id: i, latitude: (60.0 + i * 0.1), longitude: (15.0 + i * 0.1)})
WITH collect(n) as nodes
CALL spatial.addNodes('count_layer', nodes) YIELD count
RETURN count

Count after adding multiple features

CALL spatial.getFeatureCount('count_layer') YIELD count
Table 3. Result
count 
4

Create a WKT layer

CALL spatial.addWKTLayer('wkt_layer', 'wkt')

Count features in empty WKT layer

CALL spatial.getFeatureCount('wkt_layer') YIELD count
Table 4. Result
count 
0

Add a WKT point

CALL spatial.addWKT('wkt_layer', 'POINT(15.2 60.1)') YIELD node RETURN node

Add a WKT linestring

CALL spatial.addWKT('wkt_layer', 'LINESTRING (15.2 60.1, 15.3 60.1)') YIELD node RETURN node

Count features in WKT layer

CALL spatial.getFeatureCount('wkt_layer') YIELD count
Table 5. Result
count 
2

Get the number of features in a layer

CALL spatial.addPointLayer('count_layer') YIELD node
Table 6. Result
node 
(:SpatialLayer {
    geomencoder: "org.neo4j.gis.spatial.encoders.SimplePointEncoder",
    index_class: "org.neo4j.gis.spatial.index.LayerRTreeIndex",
    layer: "count_layer",
    layer_class: "org.neo4j.gis.spatial.SimplePointLayer"
})

Get count of empty layer

CALL spatial.getFeatureCount('count_layer') YIELD count
Table 7. Result
count 
0

Add two points to the layer

CREATE (n1:Point {latitude: 60.1, longitude: 15.2, name: 'point1'})
CREATE (n2:Point {latitude: 60.3, longitude: 15.5, name: 'point2'})
WITH n1, n2
CALL spatial.addNode('count_layer', n1) YIELD node as added1
WITH n2, added1
CALL spatial.addNode('count_layer', n2) YIELD node as added2
RETURN added1, added2

Get count after adding points

CALL spatial.getFeatureCount('count_layer') YIELD count
Table 8. Result
count 
2