-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
Ralf Gerlich wrote: > Hi there! > > Harald JOHNSEN wrote: >> AnMaster wrote: >> >>> -----BEGIN PGP SIGNED MESSAGE----- >>> Hash: SHA512 >>> >>> I'm wondering if it is possible to request landsat based scenery of some >>> specific area (like that was done for LinuxTag and EAA Oshkosh), if yes I >>> would like to request such scenery for the area around KSFO. That area looks >>> really bad (with a hill in the middle of the terminal for example. >>> >>> >>> >> Landsat imagery is used to determine the landclass if I understand well, >> this won't change the elevation of the terrain. This elevation is >> allways wrong where you have buildings, the radar that mesures the >> height can hit the terrain or the roof of a building. I don't know if >> there are tools to edit this kind of data. > > The SRTM-data can be imported into GRASS and edited. Export to the HGT > format is not available, but I have a tool (which is part of the > fgfs-builder) which can process height data in all raster formats > supported by GDAL. > > Alternatively one can convert the current SRTM data to contour lines, > which can then be edited using QGIS or similar, and interpolated to a > raster height field again. > > One would need _free_ reference data for appropriately adjusting the > elevations, however. Most of all, you need to make sure that the > reference data is not just based on SRTM itself (which is true for many > modern maps, which again often are not free). > > Regarding Landsat-based scenery we think that we cannot yet automate the > scenery-on-request concept fully, but we could e.g. start with accepting > external training data. > > In the (still incomplete :-/) Landsat scenery-building tutorial[1] I > have described how to create training vector maps. Maybe somebody who > has a bit of experience with either QGIS or GRASS might want to help us > to try and find a workable procedure for generating landsat-based > scenery data from externally provided training data. > > IIRC the default KSFO tiles contain customised scenery in the Alcatraz > area. Maybe somebody could tell what exactly was edited there, so we > could find out how to integrate that into a possible new landsat-based > scenery. > > Cheers, > Ralf > > [1] http://www.custom-scenery.org/Building-Scener.331.0.html > I see, so around KSFO would be a problem, but my other request (around ESOE and including the cities around 59*16 53.9N 15*13 15.8E and 59*07 50.9N 15*09 07.2E) should be less problematic I hope. Regards, AnMaster -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) iD8DBQFGtL/pWmK6ng/aMNkRCosGAJ0bg7eVGv7gg2DJj0QIvPpQCKXGfQCggutf JDBzTNzdcqDFb5xw3EZ8Sa4= =gBGA -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
