Yeah, some of the new technology for mapping is incredible. One is a flying wing that sort of porpoises, taking pictures at various angles. It gets amazing detail plus the topo/contour accuracy is incredible. For larger projects that someone plans on really dialing in, it's almost a must, IMO. For most of us, it's probably a bit cost prohibitive. I think I have a link to the service in one of the future articles. If not, perhaps I should look it up again.