When I had to solve the netherland problem months ago, I did a quick look around and understood that the NASA was using a shapefile approach (thus, vectorial) to integrate the water problem in SRTM. It is called SWBD , thought to be used with SRTM. Water shapes are available already in the ESRI data sets you are using in XCM topology. Only, XCsoar is not using them (1) and (2) they are incomplete.
But since you say you have raster data of water coverage, which I could not find as usable months ago, then your problem is already solved. Either use non-lossy DEM compression or use a separated DEM file as you said. The alternative solution is to create zoom leveled layers for topology - and thus also for coast lines to reduce items to be painted at lower zoom levels. This is precisely how commercial maps are working by the way, and it is easy to accomplish (just takes space on disk). Sorry to bother you . paolo -- Caselle da 1GB, trasmetti allegati fino a 3GB e in piu' IMAP, POP3 e SMTP autenticato? GRATIS solo con Email.it http://www.email.it/f Sponsor: Riccione Capodanno Low Cost: hotel 3 stelle sup centralissimo, zona relax, pacchetto mezza pensione con bevande, bottiglia per festeggiare. 2gg euro 165,00 a persona Clicca qui: http://adv.email.it/cgi-bin/foclick.cgi?mid=11205&d=29-12 ------------------------------------------------------------------------------ Learn how Oracle Real Application Clusters (RAC) One Node allows customers to consolidate database storage, standardize their database environment, and, should the need arise, upgrade to a full multi-node Oracle RAC database without downtime or disruption http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
