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57 lines
1.9 KiB
Plaintext
57 lines
1.9 KiB
Plaintext
{
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"name": "affine_transform",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns the geometry after an affine transformation. Calculations are in the Spatial Reference System of this geometry. The operations are performed in a scale, rotation, translation order. If there is a Z or M offset but the coordinate is not present in the geometry, it will be added.",
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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": "delta_x",
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"description": "x-axis translation"
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}, {
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"arg": "delta_y",
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"description": "y-axis translation"
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}, {
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"arg": "rotation_z",
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"description": "rotation around z-axis in degrees counter-clockwise"
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}, {
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"arg": "scale_x",
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"description": "x-axis scale factor"
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}, {
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"arg": "scale_y",
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"description": "y-axis scale factor"
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}, {
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"arg": "delta_z",
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"optional": true,
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"default": "0",
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"description": "z-axis translation"
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}, {
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"arg": "delta_m",
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"optional": true,
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"default": "0",
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"description": "m-axis translation"
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}, {
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"arg": "scale_z",
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"optional": true,
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"default": "1",
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"description": "z-axis scale factor"
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}, {
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"arg": "scale_m",
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"optional": true,
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"default": "1",
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"description": "m-axis scale factor"
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}],
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"examples": [{
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"expression": "geom_to_wkt(affine_transform(geom_from_wkt('LINESTRING(1 1, 2 2)'), 2, 2, 0, 1, 1))",
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"returns": "'LineString (3 3, 4 4)'"
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}, {
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"expression": "geom_to_wkt(affine_transform(geom_from_wkt('POLYGON((0 0, 0 3, 2 2, 0 0))'), 0, 0, -90, 1, 2))",
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"returns": "'Polygon ((0 0, 6 0, 4 -2, 0 0))'"
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}, {
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"expression": "geom_to_wkt(affine_transform(geom_from_wkt('POINT(3 1)'), 0, 0, 0, 1, 1, 5, 0))",
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"returns": "'PointZ (3 1 5)'"
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}],
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"tags": ["affine", "coordinate", "operations", "spatial", "transformation", "reference", "offset", "system", "calculations", "translation", "rotation", "order", "added", "present", "scale"]
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}
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