I know what you mean. We practically have to make our own maps of most of the lakes here.

There are ways to make your own topo map. I know guys that do this using depth and location data and an engineering program. Probably using auto-cad or an topo map making add-on for Auto-cad.

Using a data logger, gps, and depth finder all sending NEMA singles to the data logger. They probably are using a Excel type data sheet to manage the data flow into the engineering program

When I took my physical geology class at USI we learned to manually make top maps by drawing contour lines through data points that represented ground heights. But the same can be done for hyrographic data.

What we need in Southern Indiana is a Pat Hahs.

Quote Originally Posted by Stevens View Post
Thats an improvement but kentucky lake info is still much better, they even have quite a contour maps of there smaller lakes. I bust my butt tryin to get contour maps of some of the small lakes around here in southern indiana