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19 lines
608 B
Plaintext
19 lines
608 B
Plaintext
{
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"name": "m_at",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Retrieves a m coordinate of the geometry, or NULL if the geometry has no m value.",
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"arguments": [{
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"arg": "geometry",
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"description": "geometry object"
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}, {
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"arg": "vertex",
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"description": "index of the vertex of the geometry (indices start at 0; negative values apply from the last index, starting at -1)"
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}],
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"examples": [{
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"expression": "m_at(geom_from_wkt('LineStringZM(0 0 0 0, 10 10 0 5, 10 10 0 0)'), 1)",
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"returns": "5"
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}],
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"tags": ["retrieves", "coordinate", "measure"]
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}
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