Hello Thomas > * Using aerial photography on a worldwide scale means creating a second > google > earth, with all related demands as to storage space. Not to mention copyright > issues/free data sources. > Obviously redo the whole earth has no interest. > * Usually the pictures contain shadows that naturally don't align with the > sim > state most of the time. Even worse the shadow code of FG might create doubled > shadows in opposite directions. This is not so embarrassing. > * All aerial photos that are not orthorectified contain distortions > (depending > on altitude and lateral distance of the shooting aircraft), that might be > impossible to cover by a 3d building even if placed correctly. This is > especially true for high rises and skyscrapers. > > * In the densely populated areas of Paris note the mismatch between the 3d > buildings and the streets. This is not specific to aerial photos but more > pronounced, as more streets are directly visible. > This was only the first test. I counsel you to visualize the scene with objects correctly placed. You will see that the streets are where it's needed, and the record is really superb > * As it looks nice in still images at a certain altitude, I suppose much of > the effect is lost in a live session, as depth perception is improved with > motion. In Paris this degradation is probably covered by the hundreds of 3d > buildings which aren't available elsewhere (yet). > Done test and tell us what you think ;) http://helijah.free.fr/flightgear/scenery/ParisV2/ParisV2.htm#ParisV2-2 (Attention, 593 MB) > That said, I don't think your approach is meaningless. Given that the project > area is small and built up areas are covered with 3d buildings it provides a > more detailed and more accurate view of the project area than the standard > approach. Depending on the projects goals this might be what you want, as > also Curt has shown in his synthetic view video. So having kind of a tutorial > or howto seems to be a good idea, so that others might reproduce what you've > done in Paris. > It is precisely from the work of Curt that this has been achieved. This is not the ideal method, but it allows you to see that the textured soil much changes the appearance of a region FG
Best regards. Emmanuel ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
