ST_Max4ma — Raster processing function that calculates the maximum pixel value in a neighborhood.
float8 ST_Max4ma(
float8[][] matrix, text nodatamode, text[] VARIADIC args)
;
double precision ST_Max4ma(
double precision[][][] value, integer[][] pos, text[] VARIADIC userargs)
;
Calculate the maximum pixel value in a neighborhood of pixels.
For Variant 2, a substitution value for NODATA pixels can be specified by passing that value to userargs.
Variant 1 is a specialized callback function for use as a callback parameter to ST_MapAlgebraFctNgb. |
Variant 2 is a specialized callback function for use as a callback parameter to ST_MapAlgebra. |
Use of Variant 1 is discouraged since ST_MapAlgebraFctNgb has been deprecated as of 2.1.0. |
Availability: 2.0.0
Enhanced: 2.1.0 Addition of Variant 2