class SnapToGrid(expression, *args, **extra)
Availability: PostGIS, SpatiaLite (≥ 3.1)
Accepts a single geographic field or expression and returns a geometry with all points snapped to the given grid. How the geometry is snapped to the grid depends on how many numeric (either float, integer, or long) arguments are given.
| Number of Arguments | Description |
|---|---|
| 1 | A single size to snap both the X and Y grids to. |
| 2 | X and Y sizes to snap the grid to. |
| 4 | X, Y sizes and the corresponding X, Y origins. |
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