In order to enable international standardisation, the coordinate systems are to be specified on the basis of EPSG (www.epsg.io), which are also known from geoinformation systems. For technical reasons, a reduction of the systems is advantageous, and the question arose as to which systems should be used. Here are a few examples:
WGS84 unproj.: EPSG4326
Gauß-Krüger-Zone XY: f.e. Zone 3 31467
UTM32 – ETRS89: 25832
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