#pl/pgsql

Passing Arguments to Map Algebra Callbacks

The docs say that we can pass additional arguments to ST_MapAlgebra callbacks, but how do we actually do that?

A Totally Random Map Algebra Callback in PostGIS, Part 2

In this post we'll learn how to write multi-band callback functions for ST_MapAlgebra.

A Totally Random Map Algebra Callback in PostGIS

In this post we'll try to get a better understanding of the structure of ST_MapAlgebra callback functions.