Hi,
while checking if the .csv files in lib/proj/ need their regular sync
with GDAL, Frank and me wondered if we do need these files at all
(still) being present in GRASS.
Changelog of lib/proj/gcs.csv says:
2004-01-26 15:37 paul:
* : Updates for proj library and g.proj to read projection
information from various sources
But apparently nothing reads these files? Or yes?
[neteler@host550 proj]$ grep csv *.c
convert.c:#include <cpl_csv.h>
convert.c:#define CSVDIR "/etc/ogr_csv"
convert.c: /* Set finder function for locating OGR csv co-ordinate
system tables */
convert.c: SetCSVFilenameHook(GPJ_set_csv_loc);
convert.c: /* Set finder function for locating OGR csv
co-ordinate system tables */
convert.c: SetCSVFilenameHook(GPJ_set_csv_loc);
convert.c:/* GPJ_set_csv_loc()
convert.c:const char *GPJ_set_csv_loc(const char *name)
mhh:
convert.c:#define CSVDIR "/etc/ogr_csv"
convert.c: G_asprintf(&buf, "%s%s/%s", gisbase, CSVDIR, name);
and convert.c:
/* GRASS relative location of OGR co-ordinate system lookup tables */
#define CSVDIR "/etc/ogr_csv"
At this point I am unsure... also which files are really needed (there are
new CSV files in GDAL now, data/ directory; we always omitted S57).
Ideally we would just use those from GDAL. Asking Frank in IRC how to
obtain the related GDAL directory, he suggested:
"There is a function (CPLFindFile()) to find particular files.
If you really need a directory, you could likely search for a GDAL only
file, and strip the result down to a directory path"
I.e.,
const char * CPLFindFile (const char *pszClass, const char *pszBasename)
http://www.gdal.org/cpl__conv_8h.html
I presume that we could seek for "gcs.csv" and then dirname() it.
What do you think?
Markus
On Mon, Apr 13, 2009 at 8:55 PM, Markus Neteler <neteler@osgeo.org> wrote:
Frank,
from time to time I sync the csv files in lib/proj/ in GRASS to
GDAL-trunk. I did so today and found a couple of new files:[neteler@host550 proj]$ svn status
? coordinate_axis.csv
? gt_datum.csv
? gt_ellips.csv
M pcs.csv
M projop_wparm.csv
M unit_of_measure.csv
M gcs.csv
M ellipsoid.csvbesides the expected changed files. Should I add the three new
files? Any compatibility issues if folks link GRASS to older GDAL
versions?I'll document that then in lib/proj/README.txt for the future.
thanks
Markus