Use the navigation bar in the upper left corner of the map to zoom in and zoom out on Lake De Neveu. You can see satellite images of Lake De Neveu by clicking on "Satellite" or "Hybrid" in the upper right corner of the map.
Use your mouse to get GPS coordinates for any spot on Lake De Neveu. Simply click and drag the red arrow to the spot you are interested in and the geocodes (latitude + longitude) will appear in the boxes above - it's that easy!