On Sunday 26 March 2006 10:26, Paul Surgeon wrote: > On Saturday 25 March 2006 19:48, David Megginson wrote: > > On 25/03/06, Melchior FRANZ <[EMAIL PROTECTED]> wrote: > > > The airports list is barely usable: there are so many > > > entries in it that you don't easily find anything. And the > > > slider resolution is much too high for finding an entry > > > with it alone. Move it just one pixel, and you jumped over > > > oodles of airports. The arrow buttons have no repeat > > > function, so they are of limited help, too. I've now > > > hacked the airports widget to allow filtered lists: > > > > > > http://members.aon.at/mfranz/airports.jpg [30 kB] > > > > We need to get geopolitical information into our airport > > list, at least at the country and region > > (state/province/etc.) levels -- that could make the > > filtering much more useful. Proximity filtering might also > > be nice, but that's a much bigger job. > > > > > > All the best, > > > > > > David > > I did do some work on that a long time ago using the ICAO > codes to break up the data by country but ran into a couple of > problems. > > 1. There is no state/province field in the airports db and it > can't be deduced from ICAO codes. > 2. There are a couple of areas in the world that share the > same ICAO code even though they belong to different countries > so using the ICAO code isn't a 100% accurate method. > > The best would be to have a country and state/province field > in the airport DB and that would need to come from Robin Peel > unless we want to have a different DB again. > > Regards > Paul
I think we could identify the appropriate countries accurately using the geometric stuff in postgres (dunno if other dbms have the functions and datatypes). Basically, I believe we would have to take the country outlines and use them to define geometrical shapes that can then be used in a query to see, from the lat/lon which shape (country) an airfield is in. That doesn't address how we would use results though - they'd either have to be used as an additional index/look-up file or to be merged in to the existing airports file, breaking compatibility. LeeE ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
