RKKA maps in scale 1:50000 were produced since the early 1930's. The content of the first RKKA maps in scale 1:50000 was moved from older maps (German maps in scale 1:25000, Russian empire maps in scale 1:21000, 1:42000), it was used original survey, maps later editions have been updated according available cartographic material (Polish, Latvian, Lithuanian, Estonian topographic maps).
RKKA maps in scale 1:50000 were composed in the 1931 year coordinate system. Coordinates were calculated in 6 degrees areas of Gauss-Kruger projection, using parameters of Bessel ellipsoid. Frames of maps have size - 10' latitude and 15' longitude, which is considered from Greenwich.
On maps was drawn kilometer grid, minutes frames.
Relief was shown by horizontals every 10 m.
Maps were printed in two or four colors. Till WWII RKKA topographers made and published two editions of RKKA 1:50000 maps (on Lithuania territory).

RKKA map in scale 1:50000 N-35-5-В (N-35-5-C) Зарасай, 1931 (first edition). General view

RKKA map in scale 1:50000 N-35-5-В (N-35-5-C) Зарасай, 1931 (first edition), fragment showing village Aviliai (Zarasai District.)

RKKA map in scale 1:50000 N-35-5-В (N-35-5-C) Зарасай, 1940 (second edition). General view

RKKA map in scale 1:50000 N-35-5-В (N-35-5-C) Зарасай, 1940 (second edition), fragment showing village Aviliai (Zarasai District.)

Comparing fragments of maps: RKKA in scale 1:50000 N-37-60-V, one werst map (1:42000) LXX-A, two werst map (1:84000) XIV-15, map N24 in scale 1:100000 from catalog Karte des westlichen Russlands. All fragments are on territory town Simnas.

Example of RKKA maps in scale 1:50000, sheets N-33-123-A, B, C, D showing Berlin (Germany) and surroundings (fragments). Additionally on maps are given position of German and Russian army (date 1945 April 24- 1945 May 02). Maps are compiled from German TK 1:25000 maps, updated according German maps in scale 1:100000 (newest material).