[QGIS-trac] [Quantum GIS] #2705: Correct Transformation of MGI Austria Lambert to WGS 84 needed

[Quantum GIS]

#2705: Correct Transformation of MGI Austria Lambert to WGS 84 needed
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   Reporter:  gmirzi                        |              Owner:  nobody       
       Type:  enhancement                   |             Status:  new          
   Priority:  minor: annoyance              |          Milestone:  Version 1.5.0
  Component:  Projection Support            |            Version:  HEAD         
   Keywords:  MGI Austria Lambert / WGS 84  |   Platform_version:  XP           
   Platform:  Windows                       |           Must_fix:  No           
Status_info:  0                             |  
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 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",6377397.155,299.1528128]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],METHOD["Position_Vector"],PARAMETER["X_Axis_Translation",577.326],PARAMETER["Y_Axis_Translation",90.129],PARAMETER["Z_Axis_Translation",463.919],PARAMETER["X_Axis_Rotation",5.137],PARAMETER["Y_Axis_Rotation",1.474],PARAMETER["Z_Axis_Rotation",5.297],PARAMETER["Scale_Difference",2.4232]]


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

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/2705>
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