Hi all, I have downloaded the free Ordinance Survey data and have managed to convert the height data and raster data using gdal_translate. Everything works brilliant when the option --geocentric is omitted. Once --geocentric is included osgdem finished within about 20 seconds my planet now looks like a sphere with bobbles attached, almost like a leather football. I am sure it's something to with the data and the format it is in, here is gdalinfo of my converted data (excluding colour data). Does anyone know how I should convert it over so I can get a whole earth, I am guessing it's something to do with the format although osgdem reprojects the data when --geocentric is included? Using the latest SVN as of last Friday. The OS data is the best FREE data I have come across so far, although I am sure there must be higher resolution height data.
d:\OS OPENDATA\build\ras250_gb_converted>gdalinfo HP.tif-geo.tif Driver: GTiff/GeoTIFF Files: HP.tif-geo.tif Size is 4000, 4000 Coordinate System is `' Origin = (400000.000000000000000,1300000.000000000000000) Pixel Size = (25.000000000000000,-25.000000000000000) Metadata: TIFFTAG_IMAGEDESCRIPTION=1:250 000 TILE HP.TIF TIFFTAG_DATETIME=2010:05:04 10:31:47 TIFFTAG_COPYRIGHT=ORDNANCE SURVEY CROWN COPYRIGHT 2010 TIFFTAG_XRESOLUTION=254 TIFFTAG_YRESOLUTION=254 TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) Image Structure Metadata: COMPRESSION=LZW INTERLEAVE=BAND Corner Coordinates: Upper Left ( 400000.000, 1300000.000) Lower Left ( 400000.000, 1200000.000) Upper Right ( 500000.000, 1300000.000) Lower Right ( 500000.000, 1200000.000) Center ( 450000.000, 1250000.000) Band 1 Block=256x256 Type=Byte, ColorInterp=Palette Color Table (RGB with 256 entries) _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
