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Returns exterior ring of a polygon as a line. Useful for geometry generator symbology for styling only the exterior ring of polygons.
8 lines
504 B
Plaintext
8 lines
504 B
Plaintext
{
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"name": "exterior_ring",
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"type": "function",
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"description": "Returns a line string representing the exterior ring of a polygon geometry. If the geometry is not a polygon then the result will be null.",
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"arguments": [ {"arg":"geom","description":"a polygon geometry"}],
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"examples": [ { "expression":"geom_to_wkt(exterior_ring(geom_from_wkt('POLYGON((-1 -1, 4 0, 4 2, 0 2, -1 -1),( 0.1 0.1, 0.1 0.2, 0.2 0.2, 0.2, 0.1, 0.1 0.1))')))", "returns":"'LineString (-1 -1, 4 0, 4 2, 0 2, -1 -1)'"}]
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}
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