[Qgis-developer] Failed to load NAD27-83 correction file

[Radim Blazek]

It was mix of various problems.
1) I tested a file outside area of valid available grid files
2) PROJ_LIB was set by previous qgis07 installer but qgis07 was
    deleted from file system
3) PROJ checks if pj_finder was set before PROJ_LIB enviroment variable.
    pj_finder is probably set in GRASS gproj library when plugin is loaded,
    consequently PROJ_LIB was ignored

I think that it is better to avoid any variables set by installer because
files cannot be moved later and variable remains set even if files are deleted.
I added setEnvironment() to QgsCoordinateTransform which sets
PROJ_LIB to QApplication::applicationDirPath() + "/share/proj/" if not set.
Not however that it has no efect if GRASS plugin was loaded because in that case
pj_finder was already set to search in $GISBASE/etc/nad

Radim

On 5/4/06, Gary Sherman <sherman at mrcc.com> wrote:
> Radim Blazek wrote:
> > Hi,
> >
> > I have got this error on windows. I have to inspect how/where
> > to install those files (if possible, because the files are binary
> > and I worry that it is difficult to recompile them with crosscompiler).
> >
>
> In the last version, we installed the correction files in:
>  "$INSTDIR\proj_lib"
>   File "proj_lib\GL27"
>   File "proj_lib\MD"
>   File "proj_lib\TN"
>   File "proj_lib\WI"
>   File "proj_lib\WO"
>   File "proj_lib\conus"
>   File "proj_lib\epsg"
>   File "proj_lib\epsg-deprecated"
>   File "proj_lib\esri"
>   File "proj_lib\esri.extra"
>   File "proj_lib\hawaii"
>   File "proj_lib\nad.lst"
>   File "proj_lib\nad27"
>   File "proj_lib\nad83"
>   File "proj_lib\ntv1_can.dat"
>   File "proj_lib\null"
>   File "proj_lib\other.extra"
>   File "proj_lib\proj_def.dat"
>   File "proj_lib\prvi"
>   File "proj_lib\stgeorge"
>   File "proj_lib\stlrnc"
>   File "proj_lib\stpaul"
>   File "proj_lib\world"
>
> The installer then set the required environment variable PROJ_LIB:
>         PROJ_LIB=$INSTDIR\proj_lib
>
> Further information on this can be found at http://proj.maptools.org/
>
>
> --
> -gary
>
> -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-
> Gary Sherman
> Micro Resources: http://mrcc.com
>   "We work virtually everywhere"
> Quantum GIS: http://qgis.org
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>