German cartographers during the First World War (1914-1917) by increasing the content of the map of Russian Empire in scale 1:42000 issued a topographic map scale of 1:25000. Collection of these maps entitled "Russischen karte des Westlichen Grenzgebiets". This collection of maps covered the territory of present Latvia, Lithuania, Poland, Belarus and Ukraine. Maps were grouped in subgroups (Gruppe Libau, Riga, Dunaburg, Kowno, Grodno, Warschau...). On strategic territories maps of the collection have been updated. Fully or partially updated maps of towns and surroundings Kowno, Libau, Grodno, Brest, lines Modlin -Warsaw, Duneburg - Lake Naroc. At absence of maps in scale 1:42000, maps in scale 1:84000, also 1:21000, 1:126000 were used. Part of a collection of maps "Russischen karte des Westlichen Grenzgebiets" released just copying the contents of the Russian maps, part of maps filed by the place-name in German (or place-names in German side-by-side with place-names in Russian), part of the maps were fully updated (German title, horizontals every 5 meters).
The nomenclature names of maps in scale 1:25000 from the collection "Russischen karte des Westlichen Grenzgebiets" are identical to maps of the Russian Empire in scale 1:21000, only instead of letters in the Cyrillic alphabet used in Latin (A, B, C, D, E, F, G, H, J).
Most maps in scale 1:25000 released monochrome. On some maps of lines Modlin - Warsaw, Duneburg - Lake Narac red shows the position of the troops. At one of the sheets of the map of group Libau horizontals shown in brown (topographic symbols like Messtischblatt).
The size of maps in scale 1:25000 is 9' longitude and 5' latitude.
Longitude considered from Pulkovo.

+ XXVI-19-B