NAtional park service data products. FTP access to loads of data, many in E00 format. PArk boundaries, historical trails, imagery and much more http://www.nps.gov/gis/data_info/clearinghouse.html
NAtional park service data products. FTP access to loads of data, many in E00 format. PArk boundaries, historical trails, imagery and much more http://www.nps.gov/gis/data_info/clearinghouse.html