1864 – 1945, Geodät; Astronom; Geophysiker

1865 – 1911, Photogrammeter; Erfinder

1877 – 1941, Topograph

1858 – 1927, Optiker

1835 – 1909, Geodät; Photogrammeter

Leaflet | Map tiles by BSB MDZ, under CC BY 3.0. Data by OpenStreetMap, under ODbL.