Does anyone know of a good way to find topographical maps for either download or purchase?
I know the USGS and many others offer free downloadable raster topo maps for almost anywhere. But what if I want vector maps using GPS coords? I'm new to GIS but I would assume there is a de facto ...
Among the amalgam of guidebooks and maps for the Pacific Crest Trail, which guidebooks and/or maps are be the best contenders to bring on the trail? Guthook 2010 review recommends Halfmile maps ...