[Qgis-user] proj file and QGIS

[Otto Dassau]

Hi, 

we described this in the current manual - page 36:

"Problem loading a shape .prj file"

If you load a shapefile with .prj file and QGIS is not able to read the
coordinate reference system from that file, you have to define the proper
projection manually within the General tab of the Layer Properties dialog.
This is due to the fact, that .prj files often do not provide the complete
projection parameters, as used in QGIS and listed in the CRS dialog. 

For that reason, if you create a new shapefile with QGIS, two different
projection files are created. A .prj file with limited projection
parameters, compatible with ESRI software, and a .qpj file, providing the
complete parameters of the used CRS. Whenever QGIS finds a .qpj file, it
will be used instead QGIS 1.4.0 User Guide 36 5.1 ESRI Shapefiles of
the .prj.

=> This is how QGIS deals with this problem at the moment.

Regards,
 otto

Am Tue, 13 Apr 2010 16:05:33 +0100 schrieb Carson Farmer
<carson.farmer at gmail.com>:

> it's possible you prj file isn't getting read properly? what software
> did you use to create the prj file?
> you can check the properties of the layer to see if your prj info is
> correctly specified, and if not, change it manually there... you could
> also then use the define projection tool from the vector tools to
> properly specify your prj...
> 
> Carson
> 
> On Tue, Apr 13, 2010 at 3:42 PM, Yves Jacolin <yjacolin at free.fr> wrote:
> > Le mardi 13 avril 2010 16:38:39, Micha Silver a écrit :
> >> I'm not sure I understand. What did you expect to happen?
> >> With OTF enabled, when you open a vector which is projected in some
> >> different CRS, the it should appear reprojected into the project CRS.
> > Hi Micha,
> >
> > When I open a file in projection XXX in a QGIS project with a projection
> > YY + OTF enabled I would like that QGIS read the prj file of my
> > shapefile and reprojected it correctly.
> >
> > My tests showed that the prj file is not read/used by QGIS.
> >
> > Am I wrong ? Is it a known limitation depending the prj file?
> >
> > Regards,
> >
> > Y.
> > --
> > Yves Jacolin
> >
> > http://yjacolin.gloobe.org
> > _______________________________________________
> > Qgis-user mailing list
> > Qgis-user at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/qgis-user
> >
> 
> 
>