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19 lines
723 B
Plaintext
19 lines
723 B
Plaintext
{
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"name": "num_geometries",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the number of geometries in a geometry collection, or the number of parts in a multi-part geometry. The function returns NULL if the input geometry is not a collection.",
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"arguments": [{
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"arg": "geometry",
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"description": "geometry collection or multi-part geometry"
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}],
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"examples": [{
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"expression": "num_geometries(geom_from_wkt('GEOMETRYCOLLECTION(POINT(0 1), POINT(0 0), POINT(1 0), POINT(1 1))'))",
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"returns": "4"
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},{
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"expression": "num_geometries(geom_from_wkt('MULTIPOINT((0 1), (0 0), (1 0))'))",
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"returns": "3"
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}],
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"tags": ["collection", "multipart", "parts", "count"]
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}
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