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d8d850c2ed
- Make it more obvious that the distance is in CRS units, not a percentage, on the first example - Add example that ends up with floating point coordinates - Add example that returns NULL
25 lines
960 B
Plaintext
25 lines
960 B
Plaintext
{
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"name": "line_interpolate_point",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the point interpolated by a specified distance along a linestring geometry.",
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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": "distance",
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"description": "distance along line to interpolate"
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}],
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"examples": [{
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"expression": "geom_to_wkt(line_interpolate_point(geometry:=geom_from_wkt('LineString(0 0, 8 0)'), distance:=5))",
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"returns": "'Point (5 0)'"
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}, {
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"expression": "geom_to_wkt(line_interpolate_point(geometry:=geom_from_wkt('LineString(0 0, 1 1, 2 0)'), distance:=2.1))",
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"returns": "'Point (1.48492424 0.51507576)'"
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}, {
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"expression": "geom_to_wkt(line_interpolate_point(geometry:=geom_from_wkt('LineString(0 0, 1 0)'), distance:=2))",
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"returns": "NULL"
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}],
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"tags": ["distance", "interpolated", "linestring", "point", "specified", "along"]
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}
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