ST_TPI

ST_TPI
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Name

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 folcal mean with radius of one minus the center cell.


	This function only supports a focalmean radius of one.

Availability: 2.1.0

-- needs examples

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