Hi Rob,
You didn't happen to take a photo as well of the track/ROW map at Bridgton Depot, did you? I used a similar photo of the Bridgton Junction to create an overlay of the tracks, buildings, and roads at Bridgton Junction (see my post under the topic Bridgton Junction on Google Earth). It turned out really well and provides a GPS-ready view of where things once were on today's topography.