New information and maps supplemented chapters of German maps in scale 1:200000 (Reymann's Karte, Feldmässig hergestellte Fliegerkarte, Topographische Übersichtskarte des Deutschen Reiches) and chapter of Russian maps in scale 2 verst per inch (1:84000, set Two-verst map of west borderland of Russian Empire orig. named Двухверстовая карта западного пограничного пространства).

New maps covering territories of Latvia and Lithuania. It was succeed obain 2-verst maps published by original publisher (till WWI).

Sources: Latvian collectors.