On January 13, 2006 07:21 pm, Paul Surgeon wrote: > How do you plan to make sure the airport layout is rotated and positioned > accurately so that things like ILS equipment isn't off to one side or at > the wrong angle to runways? > If you're 10 meters off you're not going to be landing on the centerline > anymore. > > How about a way to pick the points at the end of each runway and set them > as ground control points which get tied to the values in the apt.dat file? > It's easy to calculate the end points of the runways from the apt.dat data. > Then the model get's rotated and stretched accordingly much like > georeferencing imagery in the GIS world. > > Paul
The process is trivial. In each file, there are lines that represent latitude and longitude. http://204.108.4.16/d-tpp/0513/00375AD.PDF The user would first use a program like Inkscape to rename at least four of those lines to the latitude and longitude that they represent. Then, he/she would use a custom program to generate a new SVG file that have all the vertices of the airport in their proper location. (Alternately we could integrate this "program" into FG, so that the users don't have to go through an extra step.) The program would recongize those latitude and longitude lines by their id field. The correct coordinates of a vertex in the SVG file could then be computed by finding the shortest-distance between that vertex and the latitude/longitude lines. It is simple algebra, but we need someone to code it. Ampere ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
