Maps of the German Empire 1: 25 000, measuring table sheets 4249 Calau

From the year 1875, the founding year of the Prussian state reception, the recording began in the style of the measuring table sheets 1: 25,000 and was essentially completed by 1912. The new photographs of the leaves, which were made before 1875, were completed in 1931. With heightline representation and reference to normal zero, they led to an independent map work, which was primarily intended to meet the increasing civil need. In 1931, the sheets of this work constituted almost exclusively the largest-scale topographic map work and thus the basis for the successive dimensions for the area of responsibility of the then Reichamt für Landesaufnahme. The measuring table sheets are available plano and are mostly supplied as monochrome, rarer than multi-coloured printing.1875年为普鲁士国家陆地测量局的创立之年，该局的测绘工作以1:25000比例尺测量平板图幅（measuring table sheets）为规范展开，并于1912年基本完成。1875年之前摄制的新版图幅相片，于1931年最终完成整备。该成果采用等高线表示法（heightline representation）并以基准零点（normal zero）为高程参照，最终形成一套独立的测绘图集，其核心目的是满足日益增长的民用测绘需求。1931年，该图集的图幅几乎是当时规模最大的大比例尺地形测绘成果，也因此成为时任德意志帝国陆地测量局（Reichamt für Landesaufnahme）管辖区域内后续测绘比例尺制定的基础依据。该测量平板图幅多为平版印刷，绝大多数采用单色印制，彩色印刷版本较为少见。