does anyone know where i can get mapping software for my pc so i can get a more detail look of my home lake such as under water points and contour lines, like topo makes of lakes or where i can download them to study. THANKS

Navplanner2. It has every lake, pond, river and the coastal waters of the continental U.S. that is on their Hotmaps premium chips. Not every pond or lake is on the program, and only a small percent of those in the program are in detailed high definition.

The program cannot be used in place of the Hotmaps chips, but it will interface with them. You can find the program for about 130 bucks including delivery.

Acme Mapper 2.0.com, it has satellite, topo, & Nexrad for the entire world

Al that and depth contours: http://mapper.angling-technologies.com/atom/pmap.php