.prj files lack TOWGS84 WKT In gdal 1.9 this can be fixed with the config option GDAL_FIX_ESRI_WKT=TOWGS84 see http://www.gdal.org/ogr/classOGRSpatialReference.html#ad556dfdc04d9ec5f1714fc6b5e0eb6a6 and http://trac.osgeo.org/gdal/ticket/4345
TIcket #5066 also has more info. On Fri, Mar 9, 2012 at 10:19 AM, Ivan Mincik <[email protected]> wrote: > On 03/09/2012 12:31 PM, Craig Leat wrote: >>> It seems that latest 'release-1_7' build (and most probably in 1.7.4) is >>> not using '+towgs' proj parameters when using on-the-fly reprojection. >>> It is visible when overlaying two layers in different projection where >>> 'towgs' parameter is needed to reproject data accurately. Currently the >>> error is the same as it would be without specifying 'towgs' parameter. >>> >>> It was working nicely in older 1.7 releases. >> >> +towgs works for me on 1.7.4, but I have to specifically set the CRS >> for the layer because it's not recognised when loading the layer. See >> bug #5071. If you manually select the CRS from the layer properties >> dialogue does it work? > > Craig, thanks for the answer. > I have found that Qgis is not using 'towgs' only if using one of the > projections from installed projection database. If I create custom > projection by 'Settings -> Custom CRS' it is working correctly. > > > To get things more clear, I am inserting missing projection (see #4945) > to internal database before building. This projection is using 'towgs'. > > > -- > Ivan Mincik > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
