Hi Brian, Brian Schack wrote:
> data (and by the way, much of this is guesswork on my part - if I'm > labouring under false assumptions, please let me know). Maneuvering > to an area in question, I checked 'srtm_elevation' and got ... nothing > at all. There is data there - checking 'v0_lake, for example, shows > lakes, and 'v0_elevcontour' shows contour lines. But I had always > thought the FlightGear elevation data was based on SRTM data - am I > wrong, or am I just using mapserver.flight.org wrong? What layers > *are* used when creating FlightGear scenery? Please see the announcement at: http://www.flightgear.org/announce.html#scenery-1.0.1 Indeed, the landuse data is available online via the MapServer site, the elevation raster apparently is not :-) I made several attempts at converting SRTM raster data into elevation contour lines for nice publishing as well as editing. One of these attempts has ended up in the 'srtm_elevation' layer on the MapServer - but only for a small testing area (I don't even remember any more which area this is ....). To my experience, converting global SRTM raster into contour lines of reasonable resolution (note: resolution != accuracy) blows the storage size up by a factor of 100 - 450 (compared to the compressed HGT imagery), depending on the shape and slope of the terrain. Given the fact that we're talking about approx. 13 GByte of compressed images, this would end up in several TByte of contour lines .... mostly just for the sake of nice visualization. Unless our database server is able to provide the required disk space, we therefore decided to stick to using the original raster images :-) Cheers, Martin. -- Unix _IS_ user friendly - it's just selective about who its friends are ! -------------------------------------------------------------------------- ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
