What you might try is scaling the lines off a paper map. Buy an
Engineers scale or an Architects scale. Engineers scales are in 10ths.
This is what I use because the plats I've seen in GA are scaled at 20
chains/inch so I can take a straight line measurement directly off the
plat (has to be original size, of course, no enlargement or reduction)
and then transfer that to a paper map. It isn't perfect but will get you
in the neighborhood.
Architect's scales are in 12ths and might be better if you scale is in