I am looking to learn how to process rasters in PG. I am looking for the complete idiots guide to. Looking into how to attack this I get lost down many rabbit holes that I cannot get out of. Is there a comprehensive tutorial that you might recommend that will teach me about callbackfunc's, window functions, and other need to know basics of advanced raster processing in PG?
I have found no tutorials online thus far. The best learning I have had on this topic to date is by following through the pieces of ST_MapAlgebra but true understanding of what it describes (after following down all the rabbit holes) is missing for me.