fix link to GCS for auto-corr DEMs
fix link to GCS for auto-corr DEMs

and change some of the documentation
agrc/gis.utah.gov,agrc/gis.utah.gov,agrc/agrc.github.io,agrc/agrc.github.io,agrc/agrc.github.io,agrc/agrc.github.io,agrc/agrc.github.io,agrc/gis.utah.gov,agrc/gis.utah.gov,agrc/gis.utah.gov