The paper describes some experiences and the methodology used for evaluation the vertical accuracy of data on the official (state) topographic maps. The vertical accuracy is an important element of quality 3D representation on the topographic maps in digital. as well as in analogous forms. A comparative way of testing is usually applied for determining the vertical accuracy. https://www.roneverhart.com/M-M-s-Peanut-Bulk-25LB-Case/