[OSM-talk] Need help with mathematics for runways

[SteveC]

I this is the same data that dutch_dk has been using then IIRC it was PD

On Fri, 2007-04-20 at 11:09 +0100, Jon Burgess wrote:
> On Fri, 2007-04-20 at 08:11 +0200, Hakan Tandogan wrote:
> > Hi everyone,
> > 
> > The x-plane.org airport runway data (which is derived from DAFIF, which 
> > is public domain) defines runways with lat/lon of the center of the 
> > runway, the direction (against true north) and length in feet.
> > 
> > I'd like to derive from that data the lat/lon of the two endpoints of 
> > the runway, if possible with the smallest amount of distortion due to 
> > small float variables.
> > 
> > Is the formula given at http://williams.best.vwh.net/avform.htm#LL 
> > (Lat/Lon given radial and distance) the correct one to use or would I 
> > have to set up a PostGIS server and feed my source data into it? If so, 
> > is there any example source for perl and/or java and postgis?
> > 
> > 
> > Regards,
> > Hakan
> > 
> 
> The original DAFIF runway data file (ARPT/RWY.TXT) contains the two end
> points of the runway so you can use this as a direct answer if you have
> it.
> 
> I wrote a script to convert DAFIF airport and runwat data to OSM but
> I've never uploaded it to SVN since no one has provided a clear 'ok' as
> to the legal status of using the data. Perhaps it would be ok provided
> we included a suitable source tag?
> 
> Let me know if you want a copy of the script.
> 
> 
> 	Jon
> 
> 
> 
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-- 
have fun,

SteveC | steve at asklater.com | http://www.asklater.com/steve/