I too have the waterShed map and it is better than nothing as there are no contour lines on the maps available, but what I dislike about it is the Map shows the old River Channel is completly wrong on the south end..... other areas would put you in a stump field where no person ventures..... I have a friend that Printed up Navonics Maps that are Accurate and do have Contour lines with so much info it might be hard to find where to start