Navionics. Lol.
The most accurate maps I have found are from a site/app called
GPS Nautical Charts, and I'm not saying they're stellar by any means. I don't fish Pigeon, but the hump you're referring to doesn't seem to be on any manufacturer's social map. It does appear to be on the map I referenced. The maps in order below are the GPS Nautical Charts app, Lowarance's Social Map, Garmin Connect, and HumminBird AutoChart LiveShare. Social maps are generally very accurate where they exist. On behalf of Lowrance/Garmin/Humminbird, I thank you for doing their job for them if you contribute.
P.S. The sizes listed for various species in a lake in Barry Mitchell's Fishing Guide are about as accurate as Navionics maps last I looked, which is admittedly over a decade ago.