Selon Curtis Olson : > I've been wondering about dispensing with the variable subdivision scheme > and just having a fixed number of divisions per 1 degree of longitude. > Perhaps having 4 subdivisions. This would double the tile width at the > equator, but would preserve the same tile widths in the "sweet spot" that > covers the bulk of the USA/Europe, and would half the width at the northern > latitudes. Then things would get really skinny up towards the poles, but > perhaps our system would handle that just fine.
If we keep the same triangle budget for every tile, we will have sparse data and features at the equator and much more than what is really needed at the poles, just because the area covered by each tile will vary greatly ( proportional to 1/cos( lat ) if my math is ok ) -Fred -- Frédéric Bouvier http://frfoto.free.fr Photo gallery - album photo http://www.fotolia.fr/p/2278/partner/2278 Other photo gallery http://fgsd.sourceforge.net/ FlightGear Scenery Designer ------------------------------------------------------------------------- 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
