GPS is fabulous, it never ceases to amaze me.
Yep. At present, I'm working on a "road atlas" of early trails and traces via which Texans in the pre-Republic and Republic of Texas eras traveled around northeastern Texas.
I use a huge collection of historic maps -- digitally matched to modern topo maps using IR DOQQs (IR aerial photos covering a quarter of a USGS 7.5 minute quad map) as intermediaries. I do what I can from my desktop, (quite a bit, actually) then head into the field with the GPS. ( In many cases, vestiges of the old roads are still visible on (suitably enhanced) aerial photos.)
Last Sunday afternoon, for grins, I mapped-in a now-vanished (8-mile long) narrow-gauge railway line from Atlanta, TX to Bloomburg, TX for some folks who are intererested in creating a "Dummy Line" RR museum.
(They called it the "Dummy" line -- because it was mute -- no whistle...)
TXnMA
Texas Archeological Stewards Network
(Yes, the official Texas spelling is without the "ae" diphthong...)