Hi Martin, Thank you very much for this (note, I am also sending it to GT users, where it got originally posted). DOes that mean that the epsg-hsql jar of GT2 contians an incorrect WKT specification of the projection? That should probably be fixed there too...
Thanks heaps for your help, I will test the projection asap, Martin Martin Desruisseaux wrote: > Hello Martin Tomko > > I finally had a chance to look at your issue. The issue is that the projection > you are using should be "Oblique_Mercator", not "Hotine_Oblique_Mercator" > (this > is not the same). Actually the projection name are somewhat confusing: > > What OGC calls "Oblique_Mercator", ESRI calls that > "Hotine_Oblique_Mercator_Azimuth_Center". > > What OGC calls "Hotine_Oblique_Mercator", ESRI calls that > "Hotine_Oblique_Mercator_Azimuth_Natural_Origin" > > There is the WKT that I got from the EPSG database (I included a TOWGS84 > element > which was not in your original WKT): > > PROJCS["CH1903 / LV03", > GEOGCS["CH1903", > DATUM["CH1903", > SPHEROID["Bessel 1841", 6377397.155, 299.1528128, > AUTHORITY["EPSG","7004"]], > TOWGS84[674.4, 15.1, 405.3, 0.0, 0.0, 0.0, 0.0], > AUTHORITY["EPSG","6149"]], > PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], > UNIT["degree", 0.017453292519943295], > AXIS["Geodetic latitude", NORTH], > AXIS["Geodetic longitude", EAST], > AUTHORITY["EPSG","4149"]], > PROJECTION["Oblique Mercator", AUTHORITY["EPSG","9815"]], > PARAMETER["longitude_of_center", 7.439583333333333], > PARAMETER["latitude_of_center", 46.952405555555565], > PARAMETER["azimuth", 90.0], > PARAMETER["scale_factor", 1.0], > PARAMETER["false_easting", 600000.0], > PARAMETER["false_northing", 200000.0], > PARAMETER["rectified_grid_angle", 90.0], > UNIT["m", 1.0], > AXIS["Easting", EAST], > AXIS["Northing", NORTH], > AUTHORITY["EPSG","21781"]] > > > I added your test case to the test script which is run everytime geotidy is > built (to be ported to Geotools later, but they were no fundamental changes in > the formulas so Geotools 2.x should be okay). Scroll down at the bottom of > that > page: > > http://hg.geomatys.fr/geotidy/file/88c080fc48b5/modules/referencing/gt-referencing/src/test/resources/org/geotools/referencing/operation/test-data/ObliqueMercator.txt > > Regards, > > Martin > > > > -- Martin Tomko Postdoctoral Research Assistant Geographic Information Systems Division Department of Geography University of Zurich - Irchel Winterthurerstr. 190 CH-8057 Zurich, Switzerland email: martin.to...@geo.uzh.ch site: http://www.geo.uzh.ch/~mtomko mob: +41-788 629 558 tel: +41-44-6355256 fax: +41-44-6356848 ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
