This subject scares me. I’m not a trained geodesist. I’m not a mathematician. Yet, I’d be derelict in my duty if I didn’t write about this subject. I know enough to be dangerous, and enough to know ...

Summary: A look at the challenge of dealing with horizontal datums in your GIS. We are moving into a new era in dealing with datum transformations. Geodata 2.0 is coming, and it can create big ...