Feature request #2705

Updated by Nyall Dawson almost 2 years ago

Hello,



I want to export a layer with MGI Austria Lambert (EPSG 31287) to WGS 84 (EPSG 4326) with fTools. The problem ist that the result has an x- and y-axis error of 100 meters or so because the transformation doesn't use the right parameters. For MGI to WGS 84 there are some different transformation methods but only MGI_To_WGS_1984_3 (EPSG 1618) is the one that is right and that is recommended by the official Austrian Institute BEV.



see also: http://img293.imageshack.us/img293/7675/transformation.png



and the correct parameters below:



Is it possible to change the parameters in QGIS transformation manually (user defined projection) or can you implement this function as a new transformation?

Thank you!



regards,

Philipp



using QGIS 1.5 under XP



1618 MGI_To_WGS_1984_3



GEOGTRAN[[MGI_To_WGS_1984_3"GEOGCS["GCS_MGI"DATUM["D_MGI"SPHEROID["Bessel_1841"63773971552991528128]]PRIMEM["Greenwich"00]UNIT["Degree"00174532925199433]]GEOGCS["GCS_WGS_1984"DATUM["D_WGS_1984"SPHEROID["WGS_1984"63781370298257223563]]PRIMEM["Greenwich"00]UNIT["Degree"00174532925199433]]METHOD["Position_Vector"]PARAMETER["X_Axis_Translation"577326]PARAMETER["Y_Axis_Translation"90129]PARAMETER["Z_Axis_Translation"463919]PARAMETER["X_Axis_Rotation"5137]PARAMETER["Y_Axis_Rotation"1474]PARAMETER["Z_Axis_Rotation"5297]PARAMETER["Scale_Difference]]



Source:

http://gullhver.os.is/website/ArcXML_Guide/Support_files/elements/dattrans.htm

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