Returns the skew of a raster object along the X axis in the spatial reference system.
Prerequisites
The raster object must have a valid spatial reference system identifier (SRID).
Syntax
float8 ST_SkewX(raster raster_obj)Parameters
| Parameter | Description |
|---|---|
raster_obj | The raster object to query. |
Examples
Query the X-axis and Y-axis skew values of all rasters in a table:
SELECT st_skewx(rast), st_skewy(rast)
FROM raster_table;Output:
st_skewx | st_skewy
----------+----------
0.3 | 0.2