On a grass lake, the edges and the holes are everything. Vegetation maps the lake's grass, pads and reeds by kind, from the latest state survey and this year's satellite, so you can fish the outside edge and the pockets instead of the middle of the mat.
Bottom Composition shows what the bed is made of — mud, sand, shell or rock — from the soundings on NOAA's charts. A crawfish bite needs hard bottom, and a point with shell on it holds fish its neighbor never will.
Vegetation by kind — cattail and reed, lily pads, torpedograss, willow — across the lake — Lake Okeechobee, Florida
Bottom Composition: mud, sand, shell and hard bottom from chart soundings — Lake Okeechobee, Florida
How to use it
Open the Maps tab and choose Vegetation, or Bottom Composition.
Zoom in for the labels: the kind of grass, or what the bottom is made of.
Fish the edges and holes in the vegetation, not the middle of it.
Look for hard bottom — shell, sand, rock — on points and humps.