ST_MatchGridLevel
Returns the highest grid level supported by terrain elevation data based on its resolution.
Syntax
smallint ST_MatchGridLevel(raster dem)Parameters
| Parameter | Description |
|---|---|
dem | The terrain elevation raster in the Geodetic Coordinate System (GSC) 2000 coordinate system (EPSG:4490). To convert data in a different coordinate system, call ST_Transform before passing it to this function. |
Description
ST_MatchGridLevel inspects the resolution of terrain elevation data and returns the highest grid level available for that data. When running path calculations, do not specify a grid level higher than the value returned by this function.
Examples
SELECT ST_MatchGridLevel(dem);Result:
21