Date Austria

the reference system date Austria forms the geodetic basis for one for Austria optimized map display of the earth's surface (see also geodetic date). It becomes in Austria also as customs system, national coordinate system, MGI (ferrous) or AT_MGI designated. The OGC EPSG code (European petroleum Survey Group) reads 6805.

The reference system develops on the Triangulierung of the military-geographical institute (MGI). For the computations the reference ellipsoid Bessel was consulted 1841 with the point of fundamental Hermannskogel. As barrel at present the Gauss jug he coordinate system with the Nullmeridian of ferrous ( 17° 40 ' to the west of Greenwich ) in use stands.

Around coordinates, itself e.g. on the global WGS84 and/or. refer the European ETRS89 date, umzurechenen to coordinates in the date Austria (and in reverse), are necessary a Koordinatentransformation. For a distortion-free transformation between different reference systems the üblichweise helmet blank transformation is used. Alternatively also the three parameters mol desert ski can - transformation or a simple x, y, z-shift to be used. The following table lists the seven parameters of a helmet blank transformation from the WSG84 and/or. ETRS89 into the date Austria:

Use starting system target system C x (m) C y (m) C z (m) s (ppm) r x (Bogensekunde) r y (Bogensekunde) r z (Bogensekunde)
government inspection department WGS84 date Austria -577,326 -90,129 -463,919 -2.4232 5.1366 1.4742 5.2970
AGREF WGS84 date Austria -577,326 -90,129 -463,919 -2.4232 15.8537 4.5500 16.3489

with the helmet blank transformation of WGS84 government inspection department - data it is to be noted that the parameters for turn and distortion from the measurements of the Federal Office for calibration and surveying (BEV) in the context of the project AGREF (Austrian Geodetic Reference Frame) not and/or. only limited for unkorrigierte government inspection department receivers and software suitable are. With application of the helmet blank transformation with the parameters of the BEV an accuracy can be expected by on the average 1,5m over completely Austria. It is to be noted that a helmet blank transformation cannot be shortened so easily on a pure x, y, z-shift.

In usual market government inspection department receivers the following values for the transformation of the WGS84 are used on the date Austria, whereby the values ΔA and ΔF refer to the difference of the axle lengths and the flattening from the WGS84 to the Bessel 1841 ellipsoid:

C x (m) C y (m) C z (m) ΔA (m) ΔF (x10 4) mark/product designation method
596 87 473 ,738 0.1003748 min Austria LV Molodensky
577.3 90.1 493.9 739.845 0.10037483 Magellan, other user Molodensky

On the date Austria are based for example the Austrian federal warning net (BMN) and the ÖAMTC road maps on a scale 1:150.000 (OD. Hölzel, Vienna). Further information for the history of the Austrian map reference systems is also in “Photogrammetric engineering & remote Sensing”, March 2004.


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