UTM-mapping

Task:
In 1995, the AdV decided to implement UTM as the associated coordinate system for the new nationally standardised ETRS89 coordinate reference system. The main reason for this choice, as well as the international distribution, was the possibility of stripes (zones) twice as wide as in the GK coordinate system and thus reducing the number of zones. The UTM mapping is very suitable for the relatively large East-West expansion of the Federal Republic of Germany due to the lower number of meridian stripes.

Definition:
Like the GK coordinate system, the UTM coordinate system is a compliant cross cylinder projection, however it basically distinguishes itself in that the centre meridians are not mapped preserving the length but instead are projected with a scaling factor of 0.9996 for minimisation of the length distortions in the stripe system. UTM is defined by the following conventions:
- compliant, transversal mercator mapping with reference to GRS80,
- right-angled coordinates in 6° wide meridian strips,
- centre meridians are the meridians 3° (zone 31), 9° (zone 32) and 15° (zone 33) East of Greenwich for the Federal Republic of Germany,
- the scaling factor of the centre meridian is 0.9996,
- the X-axis has the ordinate value of 500,000 m,
- the ordinates are designated as Easting E (East), the abscissa as Northing N (North). The zone identifier precedes the Easting.
- The validity of the system in Europe is from 0° (equator) to 84° Northern latitude.

UTM - mapping

Publications:

Hooijberg, Marten, 1997:
Practical Geodesy, Springer Verlag Berlin / Heidelberg / New York, Seiten 81-84.

Krüger, L., 1912:
Konforme Abbildung des Erdellipsoides in der Ebene, B.G. Teubner Verlag Leipzig, Seiten 11-22.


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