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19 lines
801 B
Plaintext
19 lines
801 B
Plaintext
{
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"name": "angle_at_vertex",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the bisector angle (average angle) to the geometry for a specified vertex on a linestring geometry. Angles are in degrees clockwise from north.",
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"arguments": [{
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"arg": "geometry",
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"description": "a linestring geometry"
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}, {
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"arg": "vertex",
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"description": "vertex index, starting from 0; if the value is negative, the selected vertex index will be its total count minus the absolute value"
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}],
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"examples": [{
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"expression": "angle_at_vertex(geometry:=geom_from_wkt('LineString(0 0, 10 0, 10 10)'),vertex:=1)",
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"returns": "45.0"
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}],
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"tags": ["angles", "specified", "clockwise", "angle", "linestring", "degrees", "bisector", "north", "average", "vertex"]
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}
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