On Wed, Aug 31, 2011 at 11:03 AM, Gis Mage <[email protected]> wrote: > Hi list, > > I've got a problem when trying to display GeoTiffs in EPSG:3995 and EPSG:3576. > Theese rasters are GEBCO grids in native 4326 projection. > > gdalinfo says: > ---------------- > Driver: GTiff/GeoTIFF > Files: gebco_08_4326.tif > Size is 43200, 21600 > Coordinate System is: > 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"]] > Origin = (-180.000000000000000,90.000000000000000) > Pixel Size = (0.008333333333333,-0.008333333333333) > Metadata: > AREA_OR_POINT=Area > Image Structure Metadata: > INTERLEAVE=BAND > Corner Coordinates: > Upper Left (-180.0000000, 90.0000000) (180d 0' 0.00"W, 90d 0' 0.00"N) > Lower Left (-180.0000000, -90.0000000) (180d 0' 0.00"W, 90d 0' 0.00"S) > Upper Right ( 180.0000000, 90.0000000) (180d 0' 0.00"E, 90d 0' 0.00"N) > Lower Right ( 180.0000000, -90.0000000) (180d 0' 0.00"E, 90d 0' 0.00"S) > Center ( 0.0000000, 0.0000000) ( 0d 0' 0.01"E, 0d 0' 0.01"N) > Band 1 Block=43200x1 Type=Int16, ColorInterp=Gray > ---------------- > When displaying in conic and polar projections, I get artifacts near > the north pole and the dateline. > This is what it looks like: > http://dl.dropbox.com/u/7488735/conic.png > http://dl.dropbox.com/u/7488735/polar.png > Grey areas are raster artifacts. > When displaying only vector layers in conic and polar projections > (with native EPSG4326 projection), everything looks ok. > > I guess it's a problem with geotools or gdal, and it was discussed here: > http://osgeo-org.1803224.n2.nabble.com/Polar-Stereographic-Reprojection-in-2-x-td6127778.html > > I know it, because when I set custom central meridian parameter for > polar projections, I get an error: > ------------ > Error Code: Internal error > Message: org.vfny.geoserver.wms.WmsException: Rendering process failed > Rendering process failed Error rendering feature This "AxisDirection" > object is too complex for WKT syntax. > ------------ > > Is there a workaround for this issue?
None that I know of, there is a bug in envelope reprojection on rasters that cuts short some data, which is a first known issue. Fixing it is a large amount of work, I've done some progress on it but I'm nowhere close to being able to commit the changes: http://jira.codehaus.org/browse/GEOT-3570 Even with that fixed we're going to see issues since the raster code paths do not have the "advanced projection handling" functionality that we developed last year for vector data, which can handle dateline crossing, the area of validity of some projection, and data wrapping: http://geo-solutions.blogspot.com/2010/02/geoserver-continuous-map-wrapping.html Developing similar code for the raster data rendering is possible, but is another large chunk of work (this one definitely too big to fit in my spare time) Cheers Andrea > > ------------------------------------------------------------------------------ > Special Offer -- Download ArcSight Logger for FREE! > Finally, a world-class log management solution at an even better > price-free! And you'll get a free "Love Thy Logs" t-shirt when you > download Logger. Secure your free ArcSight Logger TODAY! > http://p.sf.net/sfu/arcsisghtdev2dev > _______________________________________________ > Geoserver-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geoserver-users > > -- ------------------------------------------------------- Ing. Andrea Aime GeoSolutions S.A.S. Tech lead Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584 962313 fax: +39 0584 962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ------------------------------------------------------- ------------------------------------------------------------------------------ Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free "Love Thy Logs" t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
