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9 lines
487 B
Plaintext
9 lines
487 B
Plaintext
{
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"name": "num_rings",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the number of rings (including exterior rings) in a polygon or geometry collection, or NULL if the input geometry is not a polygon or collection.",
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"arguments": [ {"arg":"geometry","description":"input geometry"} ],
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"examples": [ { "expression":"num_rings(geom_from_wkt('POLYGON((-1 -1, 4 0, 4 2, 0 2, -1 -1),(-0.1 -0.1, 0.4 0, 0.4 0.2, 0 0.2, -0.1 -0.1))'))", "returns":"2"}]
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}
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