-------- Original Message -------- Subject: Over 1,000 Historical Topographic Maps for Google Earth Date: Thu, 6 Dec 2007 19:41:13 -0800 From: Matt Fox <[log in to unmask]> To: [log in to unmask] I've recently completed a huge update on my collection of historical USGS topographic maps for Google Earth. There are now over 1,000 historic topo maps available dating from late 1800s through 1970s. The vast majority of these are for Western US right now, but I have 1,000's more from other areas of the US that I hope to eventually get around to adding. Simply open this small network link file with Google Earth. http://www.gelib.com/maps/Topos/Topos_nl.kml Turn on the index for the map scale you're interested in (7'x7', 30'x30', etc.) to see outlines of each map. When you find the map you want to view click on the placemark in the center of the outline which will open up a pop up window with list of available maps. Click on the year of the map you want to view and the map will appear overlayed onto Google Earth. These are SuperOverlays and will increase in resolution as you zoom in. I'm only about 3/4 way through the California 7 1/2' maps, so some of those aren't working quite yet. More information on this collection can be found here. http://www.gelib.com/historic-topographic-maps I think it would be great to involve other parties in this collection, so if anyone is interested in contributing, let me know. It's easy for me to add more maps to this collection. The only time consuming process is the georeferencing. Matt Fox