Hi, My starting file of interest is an ASC file with the following gdalinfo
Driver: AAIGrid/Arc/Info ASCII Grid Files: sd_1_3_110805.asc Size is 11880, 9720 Coordinate System is `' Origin = (-117.900000000000010,33.399999999999991) Pixel Size = (0.000092592592593,-0.000092592592593) Corner Coordinates: Upper Left (-117.9000000, 33.4000000) Lower Left (-117.9000000, 32.5000000) Upper Right (-116.8000000, 33.4000000) Lower Right (-116.8000000, 32.5000000) Center (-117.3500000, 32.9500000) Band 1 Block=11880x1 Type=Float32, ColorInterp=Undefined NoData Value=-9999 Then I would translate to a tiff Code: gdal_translate sd_1_3_110805.asc lj.tif Then I used osgdem Code: osgdemd --cs "+proj=latlong +datum=WGS84" -d sd_1_3_110805.asc -l 6 -v 2 -o lj.ive I would like to translate that file to one suitable for creating a flat terrain for use with osgOcean. Doing anything less than specifying geocentric yields a nice terrain database that is 180 degrees out, so I give up on that. My desire is to take my interesting combination of bathymetric and topographic elevation data (which I can view geocentrically correctly) and make a flat terrain which will still allow me to get lat lon and alt usage. I would like to be able to "fly" above and below my section of ocean which I hope to place in the area of interest while moving around. In this "ocean centric" world, I have had problems finding my terrain with reference to my ocean and model. Ongoing questions... 1. what may I use for gdal_translate to get in shape for flat terrain? 2. could I do it all with osgdem? 3. why is my conversion "backwards" unless I specify geocentric? 4. If I use a geocentric model... what would be appropriate to use in order to get my landmass in a position suitable for my fixed ocean? 5. Does a getBoundingSpere on a geocentric terrain model return the center of the earth? Or does it return the center of the peaks and valleys of the model? (either way I have been unsuccessful in moving mountains such that they are visible with my ocean) I am using "bathymetryDEM" located at... http://seafloor.csumb.edu/SFMLwebDATA_s.htm#LJ Thank you! Many cheers, tim[/code] ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38274#38274 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
