ST_Rast2WorldCoord-ApsaraDB RDS(RDS)-阿里云帮助中心

This function computes the world coordinates of a cell using an affine transformation formula based on the pixel coordinates and pyramid level of the cell.

Syntax

point ST_Rast2WorldCoord(raster raster_obj, integer pyramidLevel,  integer row, integer column);
geometry ST_Rast2WorldCoord(raster raster_obj, integer pyramidLevel, geometrygeom);

Parameters

Parameter name	Description
raster_obj	The target raster object.
pyramidLevel	The pyramid level.
row	Line number.
column	Column number
geom	The geometry object to transform. The x-coordinate represents the column number of the pixel, and the y-coordinate represents the row number of the pixel.

Description

The raster object must have a valid spatial reference system identifier (SRID).

Example

Select ST_Rast2WorldCoord(raster_obj, 0, 0, 0) from raster_table;