oughly translated: "Royal Prussian Topographic Survey / meters above sea level"
Unfortunately the inscription of the actual elevation in the middle of the disc is missing. I don't know if it's lost or never was affixed at all.
But I found a photo of an intact benchmark of the same type at Wikipedia: http://commons.wikimedia.org/wiki/File:KoeniglPreussLandesAufnahme.JPG
The Preußische Landesaufnahme (Prussian Topographic Survey) was founded as an agency of the German Army in 1875 to produce maps for the Army, but soon it mainly performed civil topographic and geodetic surveys not only in Prussia, but in whole Germany (with exception of Bavaria).
Later it was renamed to Königlich Preußische Landesaufnahme (Royal Prussian Topographic Survey), which is the inscription on the benchmark.
When World War I broke out in 1914, it was dissolved, but in 1917 it was created again.
In 1919, after the war, it became a civil agency named "Landesaufnahme, Zweigstelle Berlin" (Topographic Survey, Berlin branch), and in 1921 it was renamed again to "Reichsamt für Landesaufnahme" (Imperial Office for Topographic Survey).…
way you can establish a horizontal control point in a vertical surface.
The advantage of these is that they won't be destroyed or paved over if the road is repaved.
But on the other hand there might be some people who wouldn't be too happy if a surveyor drills a hole in the face of their building to affix such a marker. ;-)
This is from my hometown, where there aren't many of these. But here in Hanover there are quite many (but i guess I'm one of the very few people who will notice them when walking along. ;-)
The inscription reads: "Messpunkt" meaning "measuring point".
If the exact elevation is known these points might also be used as benchmarks for vertical control.…
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