Re: Required software to convert BTG to any standard file format

> What I did was use write_bin() and write_ascii() (in SimGear) for a 
> guide line on how the data is formatted and just wrote the code to 
> output in the format I needed (SPX-200).  I'm looking into a way to 
> convert the .btg files into something Plib can understand (maybe a 
> write_ssg()).  This would possibly give us the ability to output stuff
> in many different output formats.  I've just started looking into this
> and don't know if it'll work yet.

Maybe use something more than Plib?

e.g. GDAL/OGR, supports many many input/output formats anyone would
want, BSD license I think..
  http://gdal.org/
  http://gdal.org/ogr/

(GDAL for grids; OGR for TINs [triangles])


perhaps "OGC Simple Feature" format?
  http://gdal.maptools.org/ogr/
  http://www.opengeospatial.org/


> Is there any specific format you need?  Are you interested in 
..
> 1) terrain,

see above, or use SRTM directly?


> 2) airports, 

easy enough to parse from the input file?


> 3) objects/building

Need to use a 3D vector model, e.g. GRASS 5.7:
http://grass.ibiblio.org/grass57/index.html

or DXF-3D (proprietary, maybe with non-libre OpenDWG toolkit)


regards,
Hamish

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