[Qgis-developer] SRS DB maintenance

[Radim Blazek]

On Thu, Jul 4, 2013 at 8:59 AM, Jürgen E. <jef at norbit.de> wrote:
> 7805af3cf introduces a noupdate field in tbl_srs, that is set to 1 for the
> mentioned CRSes.  And crssync doesn't update or delete records marked like
> that.

Great, thanks.

> But that flag should probably tracked somehow and set to 0 eventually,
> when the CRSes get corrected in/introduced to geotiff/GDAL/proj.4.

It seems that GDAL is occasionally synced with EPSG from libgeotif
[1], no additional overrides. In [2] is described EPSG in libgeotif.
They keep overrides separate in gcs.override.csv and pcs.override.csv,
it is not clear to me if gcs/pcs.override.csv are used somehow by
crssync or not.

If I got it,  If we want to get correct towgs84 params to srs.db in a
clean way, they must be added to libgeotif gcs/pcs.override.csv and
crssync must use them.

BTW, we have a problem [2]:

"Note that we deliberately keep alterations separate from the EPSG definitions
in gcs.csv and pcs.csv to avoid violating the EPSG distribution license
which requires that the definitions be distributed in unaltered form."

Radim

[1] http://trac.osgeo.org/gdal/log/trunk/gdal/data/pcs.csv
[2] http://svn.osgeo.org/metacrs/geotiff/trunk/libgeotiff/csv/README

>
> Jürgen
>
> [1] http://en.wikipedia.org/wiki/DWIM
>
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