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 );
Descrizione
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. |
Disponibilità: 2.1.0
Esempi
-- needs examples
Si veda anche
ST_MapAlgebra (callback function version), ST_TRI, ST_Roughness, ST_Slope, ST_HillShade, ST_Aspect