Topographical map of Bulgaria in Russian
UTM projection, WGS84 datum
Geographic limits of the map:

West: 22.1° E
East: 28.9° E
North: 44.4° N
South: 41.1° NSources of data:

Topography: NASA SRTM30;
Bathymetry: ETOPO1;
Transport, Rivers, Places: OpenStreetMap
Own work
Sources of data:

Topography: NASA SRTM30;
Bathymetry: ETOPO1;
Transport, Rivers, Places: OpenStreetMap
Ikonact, Alexey Gomankov (translate)