Jennifer Boehme grew up scouting beaches around her home in St. Petersburg, Fla., for whatever she could find. Rocks, sand dollars, coquina mollusks — anything the ocean gave up.

In fact, Lake Superior could meet the 12-inch mark all by itself. The Great Lakes Observing System wants to look through all this fresh water and map the bottom ... dimensional image of a lake ...

which uses planes to generate 3D images of the lake bed. A high-resolution map would provide a clearer picture of the lake bottoms, said Steven Murawski, a biological oceanographer at the ...

The Great Lakes map would provide fuller images of bottom features that have changed in the last 50 years due to erosion and shifting sands, giving navigators new depth findings that would improve ...

The Great Lakes map would provide fuller images of bottom features that have changed in the last 50 years due to erosion and shifting sands, giving navigators new depth findings that would improve ...