Hi,
If you do not need to reproject or you are reprojecting just between KKJ zones
you can live without towgs84 parameters. However, reprojecting to/from all the
other systems will give an error of 150-200 meters. That is the thing that is
not safe. Updating spatial_ref_sys is safe.
The
Hello all,
Last time I was successfully helped by Ralf - Thank's once more time!
http://postgis.refractions.net/pipermail/postgis-users/2011-March/029055.html
Now I have same type of problem, but I cannot get correct result.
Table is:
CREATE TABLE location (
location_id integer NOT NULL,
Hi,
I suppose that towgs84 parameters are missing. You can check this with psql:
select proj4text from spatial_ref_sys where srid=2393;
The result should be close to
+proj=tmerc +lat_0=0 +lon_0=27 +k=1.00 +x_0=350 +y_0=0 +ellps=intl
+towgs84=-90.7,-106.1,-119.2,4.09,0.218,-1.05,1.37
