[gdal-dev] Projection definition issue with Mapinfo files

[Even Rouault]

Le lundi 29 août 2011 13:34:22, Yves Jacolin a écrit :
> Hello,
> 
> One of QGIS user report an issue with mapInfo file (TAB file). If you
> understand french you can see the thread here:
> http://georezo.net/forum/viewtopic.php?pid=197022

This looks really similar to the issue raised in ticket 
http://trac.osgeo.org/gdal/ticket/3292 that you reported almost 2 years ago 
;-) but that did not see any progress unfortunately :-(

Although not a specialist of the mapinfo format, I think the fix for EPSG:2154 
should be straightforward (adding an entry in a table) once we know the 
mapinfo code that matches to the Reseau_Geodesique_Francais_1993 datum. One 
way to get it would be to attach the COMMUNEL93.TAB (and the other related 
files that make dataset) mentionned in 
http://georezo.net/forum/viewtopic.php?pid=197022 to the ticket.

> 
> I try to sum up the issue in english in this email. The process is basicly
> as follow:
> 1. check projection information with ogrinfo
> 
> > DATUM["GRS_80",
> > 
> >             SPHEROID["GRS 80",6378137,298.257222101],
> 
> 2. update projection information file with ogr2ogr:
> > ogr2ogr -f "MapInfo file" -s_srs "EPSG:2154" -t_srs "EPSG:2154" new.tab
> 
> origin.tab
> 
> 3. check projection information with ogrinfo
> 
> > DATUM["WGS_1984",
> > 
> >             SPHEROID["WGS 84",6378137,298.257223563],
> 
> 1 and 3 show differents projection information! If I try to change file
> format to shp, it seems that projection information are correct.
> 
> I can share tab files if needed.
> 
> Any idea? Thanks.
> 
> Y.