--- In GravityRailroads@yahoogroups.com, "Hamel, Matthew" <mhamel@...>
wrote:
>
> I don't remember if I passed this on before, but ACME Mapper is a
good viewer that allows you to toggle between Google aerials, USGS
topos, Google street maps and other aerial photos. For example:
http://mapper.acme.com/?ll=41.60179,-75.46572&z=15&t=S
>
> Main site here: http://mapper.acme.com/
>
> With the zoom, you can get close to the scale of the Penn Pilot
photos and the historic USGS mapping at http://historical.mytopo.com/
>
> See
http://historical.mytopo.com/getImage.asp?fname=hnsd92sw.jpg&state=PA
(location of earlier link at western edge of map at center.
>
> Matt
>

For those who have a GPS and want to utilize USGS Historical maps and
such I found a program called ExpertGPS web site is

http://www.expertgps.com/

It takes a bit to integrate a scanned map but it works. Its free to
use for 30 days and $50 to register it. Very well worth it.

Mike