During the interwar period, an estimated 32–36% of Polish territory was covered by the Polish Military Geographical Institute’s (Pol. Wojskowy Instytut Geograficzny) 1:25,000 detailed map. At the same time, the MGI achieved a full coverage of the country by 1:100,000 tactical map. 50% of tactical map sheets were revised for the 1930s – many covered areas for which no detailed maps had been printed. Considering the fact that 1:100,000 tactical map was updated on the basis of revised 1:25,000 maps, another 17–21% of 1:25,000 detailed map sheets were finished or in progress by the German and Soviet invasion in 1939. The study confirmed additional 4% of 1:25,000 detailed map sheets as ‘partially compiled’ by the MGI and finished by the Germans. Another 17% of detailed map sheets are potentially to be found. Hypotheses, clues and evidence are presented in the paper.
Cebrykow P., 2015, Dawne mapy topograficzne Lubelszczyzny jako źródła informacji w badaniach historyczno-geograficznych (Early topographical maps of Lublin region as information sources in historical-geographical studies). In: A. Czerny: Dawne mapy topograficzne w badaniach geograficzno-historycznych (Early topographical maps in geographical-historical studies). Lublin: Wydawnictwo UMCS, p. 100. Available online at: http://phavi.umcs.pl/at/attachments/2016/0708/103742-czernydawne-mapy-07-07-low-res.pdf
Konopska B., 2016, The cartographic materials auxiliary in the determination of the borders of Poland during the Paris Peace Conference (1919–1920) in the light of archival records. “Polish Cartographical Review” Vol. 48, no. 2, pp. 67–75. https://doi.org/10.1515/pcr-2016-0006