Hi, just a note: we have no problem using the same grids in OS Windows. (tested with Postgres 8.4 and Postgis 1.4 or 1.5)
HTH, Fred. 2010/6/9 Luís de Sousa <luis.a.de.so...@gmail.com> > Dear Frank, > > Thank you for your message, please read my comments below: > > >A few suggestions: > > > > * The +nadgrids= directive can include a full path if you want to be > > certain that path issues are not coming into play. > > I tried this first, the result is exactly the same. > > > * If you can ensure that the PROJ_DEBUG environment variable is set to > > some value before running the postgres server, you may well see proj > > debug output in the terminal window or log for the server. This should > > include information on what grid shift files are picked up and used for > > transformations. > > Ok, I'll try that next. > > > * Your email did not make it clear what the definitions were for > > pt:dlxhg, +init=pt:pttm06 or what the proj4text for 3763 is in the > > database making it hard to see if the transform was the same as you > > did with cs2cs. > > Here are the definitions in the /usr/share/proj directory: > > # PTTM06 do datum ETRS89 > <pttm06> > +proj=tmerc > +ellps=GRS80 > +towgs84=0,0,0 > +lat_0=39d40'05.73"N > +lon_0=08d07'59.19"W > <> > > # Hayford-Gauss datum Lisboa > <dlxhg> > +proj=tmerc > +ellps=intl > +nadgrids=ptLX_e89.gsb > +lat_0=39d40 > +lon_0=8d07'54.862"W > <> > > And here are the strings in the PostGis database: > > pontosDTU=# select proj4text from spatial_ref_sys where srid = 20791; > +proj=tmerc +lat_0=39.66666666666666 +lon_0=1 +k=1 +x_0=0 +y_0=0 > +ellps=intl +pm=lisbon +units=m +no_defs > +nadgrids=/usr/share/proj/ptLX_e89.gsb > > pontosDTU=# select proj4text from spatial_ref_sys where srid = 3763; > +proj=tmerc +lat_0=39.66825833333333 +lon_0=-8.133108333333334 +k=1 > +x_0=0 +y_0=0 +ellps=GRS80 +units=m +no_defs > > If you or somebody else want to try it up, the gird files package is > available from the University of Oporto, courtesy of prof J.A. > Gonçalves: > > http://www.fc.up.pt/pessoas/jagoncal/coordenadas/grelhas.zip > > I unpacked all its contents to /usr/share/proj. Btw, my system is Ubuntu > 9.10. > > Before I go, I just want to make sure that in principle PostGis should > be able to use the grid files simply by the indication of its > location, no additional configurations needed. Is this correct? > > Thank you once more, > > Luís > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users >
_______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users