Consider this: a seemingly ordinary spot atop the highest point of the Olympiapark. This is no ordinary place. This is the Geodätischer Referenzpunkt München. It’s a cornerstone of Bavaria’s surveying system. But what exactly is a geodetic reference point?
The Geodätischer Referenzpunkt München is a precisely measured location. It provides a fixed reference for surveying and mapping. Think of it as a high-tech stake in the ground. This point helps create accurate maps and spatial data. These are essential for everything from construction to navigation.
This specific reference point uses two coordinate systems. One is ETRS89. The other is DHDN90. ETRS89 is a three-dimensional system. It relies on the global GRS80 ellipsoid. DHDN90 uses the local Bessel ellipsoid. This is also known as the “Potsdam Datum.”
Let’s dive into the coordinates of the Geodätischer Referenzpunkt München. In ETRS89, its geographical coordinates are 48° 10.19361′ north latitude and 11° 33.09162′ east longitude. In three-dimensional Cartesian coordinates, it’s X = 4175739.70, Y = 853475.32, and Z = 4729951.00. For UTM 32, it’s 32689699.83 E and 5338331.79 N.
Switching to DHDN90, the geographical coordinates are 48° 10.24872′ north latitude and 11° 33.17429′ east longitude. In the Gauss-Krüger projection (GK4), the coordinates are 4466749.73 right and 5336972.69 high.
Now, let’s talk about elevation. The Geodätischer Referenzpunkt München stands at 565.09 meters above Normalhöhennull (NHN) using the DHHN2016 standard. It is 565.13 meters above NN using DHHN12. Relative to the GRS80 ellipsoid, it’s 610.76 meters.
The Bavarian State Office for Digitizing, Broadband and Survey oversees this reference point. Known as LDBV, this office is vital. It manages Bavaria’s surveying and geoinformation. The LDBV evolved from earlier surveying bodies. These include the Topographische Bureau founded in 1801.
The LDBV plays a key role in Bavaria’s digital infrastructure. It maintains the largest lithographic library in the world. This archive preserves early land survey maps. The LDBV also supports the expansion of high-speed internet.
So, as you stand at the Geodätischer Referenzpunkt München, remember its significance. It’s more than just a marker. It represents the intersection of history, technology, and precise measurement. It ensures that Bavaria remains accurately mapped and positioned in our ever-changing world. Take a moment to appreciate the unseen framework that this point provides. It is the foundation upon which much of our modern infrastructure relies.