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1d845c8a6c
Added explanation what this new expression actually calculates, based on help coded in /src/core/geometry/qgscurve.h Also streamlined noted requirement that needs to be applied to a curve.
14 lines
572 B
Plaintext
14 lines
572 B
Plaintext
{
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"name": "sinuosity",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the sinuosity of a curve, which is the ratio of the curve length to the straight (2D) distance between its endpoints.",
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"arguments": [
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{"arg":"geometry", "description": "Curve (circularstring, linestring) whose sinuosity to evaluate"}
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],
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"examples": [
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{ "expression":"round(sinuosity(geom_from_wkt('LINESTRING(2 0, 2 2, 3 2, 3 3)')), 3)", "returns":"1.265"},
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{ "expression":"sinuosity(geom_from_wkt('LINESTRING( 3 1, 5 1)'))", "returns":"1.0"}
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]
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}
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