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19 lines
738 B
Plaintext
19 lines
738 B
Plaintext
{
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"name": "interior_ring_n",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns a specific interior ring from a polygon geometry, or NULL if the geometry is not a polygon.",
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"arguments": [{
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"arg": "geometry",
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"description": "polygon geometry"
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}, {
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"arg": "index",
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"description": "index of interior to return, where 1 is the first interior ring"
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}],
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"examples": [{
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"expression": "geom_to_wkt(interior_ring_n(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),(-1 -1, 4 0, 4 2, 0 2, -1 -1))'),1))",
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"returns": "'LineString (-0.1 -0.1, 0.4 0, 0.4 0.2, 0 0.2, -0.1 -0.1))'"
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}],
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"tags": ["interior", "polygon", "hole", "ring"]
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}
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