Geospatial data formatted for use with Google Earth™ software is written in Keyhole Markap Language (KML) and is significantly different from shapefiles and similar data used in GIS applications. This page includes download links for KMZ (zipped KML) versions of maps presented on this website. Save the files on your hard drive and open using Google Earth™ software. Please note that some files are very large (indicated by ) and may not perform well. Be sure to download and install Google Earth™ on your computer first.