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function If set to true and no explicit rotation center point is specified (ie rotation happens around the geometry's center), then the rotation is applied around the center of each part individually instead of the geometry as a whole. This is designed mostly to aid cases when rotate is used as a cartographic tool as part of a geometry generator symbol layer. Sponsored by North Road, thanks to SLYR
14 lines
1.1 KiB
Plaintext
14 lines
1.1 KiB
Plaintext
{
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"name": "rotate",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Returns a rotated version of a geometry. Calculations are in the Spatial Reference System of this geometry.",
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"arguments": [ {"arg":"geometry","description":"a geometry"},
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{"arg":"rotation","description":"clockwise rotation in degrees"},
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{"arg":"center", "optional":true,"default":"NULL", "description":"rotation center point. If not specified, the center of the geometry's bounding box is used."},
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{"arg":"per_part", "optional":true, "default":"false","description": "apply rotation per part. If true, then rotation will apply around the center of each part's bounding box when the input geometry is multipart and an explicit rotation center point is not specified."}
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],
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"examples": [ { "expression":"rotate($geometry, 45, make_point(4, 5))", "returns":"geometry rotated 45 degrees clockwise around the (4, 5) point"},
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{ "expression":"rotate($geometry, 45)", "returns":"geometry rotated 45 degrees clockwise around the center of its bounding box"}]
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}
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