The maps were developed and produced by officers of the Corps of Engineers of the US Army.
The swampy terrain between Leipzig and Lindenau is quite clear and definite.
As to your knowledge of the period, you have no idea what either Col Elting or I knew or know presently. For example, I've seen Col Elting's library from the time I spent with him and it was excellent. While my personal library is not definitive by any means, it is quite good and half of the approximately 2,000 volumes are on the period. That you make such a statement only reveals the bankruptcy of your argument.
I've studied the period for over 45 years, and Col Elting longer than that. He also taught military history for eleven years at West Point.