[Qgis-user] Recognition of SRS in MapInfo-Files

[Bo Victor Thomsen]

Andreas -

The problem is twofold -

  * QGIS (or rather the underlying ogr library)  has a bug in some cases
    when determining the projection in TAB files (i.e EPSG:25832) . This
    bug is solved in version 1.10 of GDAL.
  * Your editing of QGIS CRS parameter database  won't give you the
    wanted result, because when QGIS try to find the projection of a tab
    dataset it (probably) goes like this:
    a) find MapInfo specific projection parameters in tab file,
    b) convert these to the equivalent  proj4 definition and
    c) do a reverse lookup to find the EPSG code
    QGIS never will never find your edited CRS parameters

As you suggested, a solution to this problem could be to let QGIS 
override the "build-in" projection in a tab file with a .qpj companion 
file just like the case with shape files. (Doesn't it do this already ?)
I suggest you make a feature request on the QGIS bugtracker


Regards
Bo Victor Thomsen
Aestas-GIS
Denmark

Den 25-05-2013 01:57, Fischer, Andreas skrev:
> Re: [Qgis-user] Recognition of SRS in MapInfo-Files
>
> Dear Community,
>
> I just hadanidea:
>
> If a shape fileis created withQGIS a .qpjfile is createdas well. This 
> file is used always when it isexisting.QGISdoesn't care of settings in 
> .prj file and just uses the definitions in .qpj file.That seems to be 
> almost perfect, becauseallchanges of the build in SRS definitions are 
> consideredin that qpj file.Unfortunately this file is without usefor 
> MapInfo TAB files.
>
> Wouldn't it be possibleto make this goingonwith other formats as well? 
> Thismight be a solution that does not care about ogrsettingsin first 
> place. If ogr works fine nobody has needs for .qpj files. But in other 
> cases,everyonecould determinethe parameters to use. If these are 
> defined exactly like build in SRS matching should not be a problem.
>
> Best regards
>
> Andreas
>
>
> Mit freundlichen Grüßen
>
> Im Auftrag
>
> Andreas Fischer
>
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