[postgis-devel] Heatmaps with raster

[Sandro Santilli]

I'm looking at how to optimize the production of a "density map"
to avoid a table scan for each grid cell (which scales pretty bad).

The idea is to use a temporary raster as the state value and "print"
each scanned geometry over it, in a single table scan.

Can postgis raster be used for this approach ?

In other words, is there a function to rasterize a geometry against
an existing raster?

--strk;