Today we'll examine the implications of calculating slope on a tiled DEM.
The docs say that we can pass additional arguments to ST_MapAlgebra callbacks, but how do we actually do that?
In this post, we'll learn how to create a multi-band raster from another raster using PostGIS.
In this post we'll learn how to write multi-band callback functions for ST_MapAlgebra.
In this post we'll try to get a better understanding of the structure of ST_MapAlgebra callback functions.
In this post, we'll learn how to create a multi-band raster from scratch using PostGIS.
In this post, we'll learn how to create a single-band raster from scratch using PostGIS.
Our only goal in this post is to make sure we have installed PostgreSQL's PL/V8.