ST_TPI — Returns a raster with the calculated Topographic Position Index.
raster ST_TPI(
raster rast, integer nband, raster customextent, text pixeltype="32BF" , boolean interpolate_nodata=FALSE )
;
Calculates the Topographic Position Index, which is defined as the focal mean with radius of one minus the center cell.
This function only supports a focalmean radius of one. |
Availability: 2.1.0
-- needs examples