Topographical map 1: 50 000 — Edition State (1979-1989) M-33-4-B Lübben (Spreewald)

The topographic maps, referred to as the issuing State (AS), were primarily for military purposes and carried the level of “confidential classified information”. Content levels of TK50 AS are: Floor Plan/Grid Net-Black, Water Blue, Relief/Street Filling/Building Areas-Red Brown, Forest Area Green.这批以发布国（AS）标识的地形图，主要服务于军事用途，其保密级别为“机密涉密信息”。TK50 AS型地形图的内容层级划分如下：平面图/网格网-黑色，水系-蓝色，地貌/道路填充/建筑区域-红棕色，林区-绿色。