Some of you have sent me PMs that you are having trouble because the USGS Historical Maps list GPS coordinates in
Decimals, but when you transfer them to Google Earth they are changed to
Degrees, Minutes, Seconds. It appears that this is the default GPS format for Google Earth but it is a simple process to change it. In Google Earth, go to
Tools menu and click on
Options and in the window that pops up go to
Show Lat/Long and click
Decimals and then click
OK and this convert Google Earth Lat/Long to Decimals. I am including a picture that shows both windows in Google Earth and also a link to my YouTube video that shows the process can be viewed at:
http://youtu.be/R4nV2LnVwrA
Hope this helps.