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36 lines
1.8 KiB
Plaintext
36 lines
1.8 KiB
Plaintext
{
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"name": "smooth",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Smooths a geometry by adding extra nodes which round off corners in the geometry. If input geometries contain Z or M values, these will also be smoothed and the output geometry will retain the same dimensionality as the input geometry.",
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"arguments": [{
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"arg": "geometry",
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"description": "a geometry"
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}, {
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"arg": "iterations",
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"optional": true,
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"default": "1",
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"description": "number of smoothing iterations to apply. Larger numbers result in smoother but more complex geometries."
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}, {
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"arg": "offset",
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"optional": true,
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"default": "0.25",
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"description": "value between 0 and 0.5 which controls how tightly the smoothed geometry follow the original geometry. Smaller values result in a tighter smoothing, larger values result in looser smoothing."
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}, {
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"arg": "min_length",
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"optional": true,
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"default": "-1",
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"description": "minimum length of segments to apply smoothing to. This parameter can be used to avoid placing excessive additional nodes in shorter segments of the geometry."
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}, {
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"arg": "max_angle",
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"optional": true,
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"default": "180",
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"description": "maximum angle at node for smoothing to be applied (0-180). By lowering the maximum angle intentionally sharp corners in the geometry can be preserved. For instance, a value of 80 degrees will retain right angles in the geometry."
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}],
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"examples": [{
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"expression": "geom_to_wkt(smooth(geometry:=geom_from_wkt('LineString(0 0, 5 0, 5 5)'),iterations:=1,offset:=0.2,min_length:=-1,max_angle:=180))",
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"returns": "'LineString (0 0, 4 0, 5 1, 5 5)'"
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}],
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"tags": ["adding", "corners", "smoothed", "dimensionality", "round", "output", "contain", "input", "retain", "extra", "smooths", "nodes", "values", "same"]
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}
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