This topographic street plan of Bauska, in the former Latvian SSR, was published by the Main Administration of Geodesy and Cartography in the Soviet Union in 1987.

This was during perestroika, and it is interesting to consider how far ‘openness’ is reflected in a map of this era.

On the one hand …	On the other …
The map is labelled a ‘plan scheme’, indicating censorship.	Water features are filled with a blue halftone pattern, and not the blue horizontal rulings applied to heavily censored maps for the general public.
The security classification is ‘for service use only’ with a space left for the ‘copy number’ of the map. When the map was issued to a government employee, they would be required to account for it at least once a year, and the copy number would be recorded on the face of the map. It would also be recorded in their employer’s register of classified documents.	The details of the map appear to correspond to true position on the ground.
Contours are unlabelled.	But they appear every 5 meters.
The map is printed in Russian. (Despite this, it is possible to transliterate placenames back into Latvian, minus the distinction between short and long vowels).	The map indicates it was published by the Soviet Union’s civil map publishers, the Main Administration of Geodesy and Cartography, by enterprise number 5. This was later acknowledged to be the Riga Cartographic Factory, in Latvia.

Maps of another thirty cities in Latvia are available from TROPICARTA (requires Chomikuj account).