ST_TPI
Name
ST_TPI — Returns a raster with the calculated Topographic Position Index.
Synopsis
raster
ST_TPI
(
raster
rast
, integer
nband
, raster
customextent
, text
pixeltype="32BF"
, boolean
interpolate_nodata=FALSE
)
;
Description
Calculates the Topographic Position Index, which is defined as the focal mean with radius of one minus the center cell.
![[Note]](./images/note.png)
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This function only supports a focalmean radius of one. |
Availability: 2.1.0
See Also
ST_MapAlgebra (callback function version) , ST_TRI , ST_Roughness , ST_Slope , ST_HillShade , ST_Aspect