The contours were from Global Mapper, imported to OCAD (Orienteering Computer Aided Design), and I used an aerial shot from Bing Maps as a drawing template. Then I did minimal fieldchecking. I'm sure there's more detail out there in the woods, but that wasn't the purpose of the map. I gave it to my aunt for her 80th birthday.
Doing this gave me the idea of looking for customers with large estates who would like a similar map. Has anyone looked into that market?