[postgis-devel] WKTRaster & overviews

[Martin Daly]

> None that are significant, just an attempt to maintain the cleanliness
> of the raster_columns table, and - deliberately - preventing overviews
> being used independently of their base coverage.

I thought of another: it is a way to guarantee that the other metadata
columns do not contain conflicting information, e.g. different srid-s,
mismatched pixelsize + overview_factor.

Again, not too significant.

M