need gps suggestion
NEED recommendation for a GPS. I have about 500 acres of farm land. However I have a hard time of ascertaining where the boundary lines are. What would be a good gps that would indicate to me if I have cross the boundary line of my farm. All 500 acres are planted in trees and when I'm working on the farm I can not tell if I have gone over into another person's land. any suggestions would be a great help...