Does anyone use GIS? Just curious. Wanting to exchange ideas and methods.
I have been incorporating the Marbles in N. California into a GIS database. There are hundreds of caves there and the karst is like swiss cheese. The old surface survey they did before satellites was pretty good, but the Old Timers have forgotten cave locations. Gps is not enough to "re-find" old entrances due to karst nature.
I use QGIS. I bought a relatively in-expensive commercial grade gps to mark cave entrances and such. And then the F.S. had extra money and ran LIDAR over the area. Still actively working on the data, it's a massive project.
cheers,
Tom