We have failed to note an important event: on 13th June this year, Col Robert Bauer defended his PhD thesis on the "Transformation method for points in a non-uniform triangulation network into the uniform coordination system" (in Polish), which allows accurate callibration of maps, including those by WIG, for navigational (gps) purposes. Congratulations!

Mapster:
Because we’re rather busy at work, we’ve had to re-schedule map updates. This time, we have added about 40 sheets to the German, WW1, 1:100,000 map of western Russia (Karte des westlichen Russlands): H18, K28, K37, L25, O14, O16 - O18, O35, P17, P19, P31, P32, P35 - P38, Q11, Q14 - Q16, Q36 - Q38, R36, R37, R40, S36, S38, S41, T35 - T37, T39 - T41, U35 - U38, U40 i U41.
Some of them are different editions, e.g. 1914 and 1915, although no apparent updates are visible. Most of them are courtesy of the University of Berkeley library, and the Library of Congress, due to the efforts of our collegues from www.easteurotopo.org, for which we are very grateful indeed. Other sheets have been provided by private collectors.

Additionally, three German 1:100,000 (Grossblatt) sheets have been added: No 37, 67 and 317.