PostGIS
Name
ST_WorldToRasterCoordX — Returns the column in the raster of the point geometry (pt) or a X and Y world coordinate (xw, yw) represented in world spatial reference system of raster.
Synopsis
integer +`*`+ST_WorldToRasterCoordX*(`raster `rast, geometry
pt`)`;
integer +`*`+ST_WorldToRasterCoordX*(`raster `rast, double
precision xw`)`;
integer +`*`+ST_WorldToRasterCoordX*(`raster `rast, double
precision xw, double precision yw`)`;
Description
Returns the column in the raster of the point geometry (pt) or a X and Y world coordinate (xw, yw). A point, or (both xw and yw world coordinates are required if a raster is skewed). If a raster is not skewed then xw is sufficient. World coordinates are in the spatial reference coordinate system of the raster.
Changed: 2.1.0 In prior versions, this was called ST_World2RasterCoordX
Examples
SELECT rid, ST_WorldToRasterCoordX(rast,3427927.8) As xcoord,
ST_WorldToRasterCoordX(rast,3427927.8,20.5) As xcoord_xwyw,
ST_WorldToRasterCoordX(rast,ST_GeomFromText('POINT(3427927.8 20.5)',ST_SRID(rast))) As ptxcoord
FROM dummy_rast;
rid | xcoord | xcoord_xwyw | ptxcoord
-----+---------+---------+----------
1 | 1713964 | 1713964 | 1713964
2 | 1 | 1 | 1