Just discovered ST_Node, a function in PostGIS just for noding geometries. I used to use ST_Union for this, a potentially memory intensive operation. Now I can use ST_Node.
For usage, see the PostGIS docs (requires 2.0 and GEOS 3.3.2 for bug free use).
Back to coding. That is all.
Smathermather's Weblog 
Sounds useful but I think this function needs an illustration that explains what’s going on. I’m having trouble imagining what it really does.
Indeed, that’s a good idea. It was a post approaching the austerity of a tweet, given my schedule at the moment. I will follow up with an illustration, hopefully soon. BTW, your blog is among my very favorites.