at UC Berkeley Soda Hall, for the San Francisco PostgreSQL Users Group
and again at the College of Natural Resources for GIS Day 2012
main slides and dustymugs’ raster slides
errata:
* The ST_MakeValid(geom) example could have been expanded to include ST_IsValidDetail()
* It is arguably wrong to say that Lat/Lng (EPSG:4326) data is one of the projections. I meant to present that there are spatial reference systems and you use one per table, so calling Lat/Lng one of them made one less turn in the directions for use. But so it goes.