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Showing posts from October, 2014

Spatial reference systems and transformations in Austria

Transforming data from Austrian local coordinate system to WGS84 should be a no brainer but this is GIS stuff we are talking about and therefor it isn't :) First I am posting some great references for my own sanity that I find it again and that other GIS, Geoinformatik students find some help. Link to epsg codes for Austria ESRI Synergis:  http://www.esri-austria.at/downloads/coords_at.html Für Datumsübergänge von MGI nach WGS 1984 sollte, falls keine genauen Werte für die 7 Parameter Transformation vorliegen, jene der ÖK 50 vom BEV verwendet werden - dies entspricht MGI_To_WGS_1984_3 (EPSG-code 1618). Link 1 : We in Austria DO have a Datum shift in order to move from a Projected Coordinate System to Geographic Coordinate system and the two magic code numbers are in this file below (1618(the rest of us in Austria and 1194(for Steirmark)) http://svn.osgeo.org/metacrs/geotiff/trunk/libgeotiff/csv/datum_shift.csv BIG NOTE on PROJ4 taken from the homepage: OTHER PR