Hi list,
We are experiencing problems with GeoTIFF images generated by gdalwarp (v1.9.2)
while map projecting towards a Polar Stereographic projection, particularly
EPSG:3031 (although other PS map projections showed the same effect). The
source image is a World Mercator (EPSG:3395) projected GeoTIFF which displays
and reports map proejction info correctly in QGIS, ArcMap, and others. Running
gdalwarp -s_srs EPSG:3395 -t_srs EPSG:3031 test.3395.tif test.3031.tif
generates a GeoTIFF whose map projection info cannot be read using ArcMap
(v10.1 in our case). For the out image gdalinfo is reporting
>gdalinfo test.3031.tif
Driver: GTiff/GeoTIFF
Files: test.3031.tif
Size is 398, 398
Coordinate System is:
LOCAL_CS["WGS 84 / Antarctic Polar Stereographic",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]],
AUTHORITY["EPSG","3031"],
UNIT["metre",1]]
....
Two items seem to be wrong/missing:
1) The LOCAL_CS definition instead of an expected PROJCS definition
2) No projection parameters like PROJECTION["Polar Stereographic..."],
PARAMETER["central_meridian",0], UNIT["metre",1,..].. exist, only the AUTHORITY
including EPSG code 3031.
In addition, it appears that some (not all) GeoTIFF files projected using
gdalwarp (1.9.1) into Polar Stereographic (EPSG:3031) as above cause problems
when publishing via the Geoserver admin GUI (v2.2.x). The problem appears when
trying to save the raster layer's properties - the native SRS appears
undefined, presumably because Geotools has had issues with the LOCAL_CS header,
so that only "reproject native to declared" actually works. The other two
options ("keep native" and "force declared") cause a stack trace, and failure
to save the layer properties.
Files are available at ftp://ftp.bas.ac.uk/ancz/test.3395.tif and
ftp://ftp.bas.ac.uk/ancz/test.3031.tif
Any help appreciated.
Andreas
This message (and any attachments) is for the recipient only. NERC is subject
to the Freedom of Information Act 2000 and the contents of this email and any
reply you make may be disclosed by NERC unless it is exempt from release under
the Act. Any material supplied to NERC may be stored in an electronic records
management system.
_______________________________________________
gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
