[Therion] How to create KML files

[Olly Betts]

On Sun, Mar 22, 2015 at 10:04:42PM -0000, Henry Bennett wrote:
> Bill Gee writes:
> > "therion: warning -- data not georeferenced -- unable to export KML file"
> > 
> > I think this is because I have not included latitude/longitude information.
> > 
> > My question is ...  How is latitude and longitude specified?
> > 
> > Reading through the Therion book, it seems it is done in the "cs" statement 
> > within the centerline.  However, the syntax is not clear.   Are there any 
> > examples that show how it is done?

> Use Fix
> 
> http://therion.speleo.sk/wiki/doku.php/tbe:wiki2?s[]=fix&s[]=entrance

You need to both specify a coordinate system with "cs" *and* use "fix"
to locate at least one station in that coordinate system, e.g.:

cs long-lat
fix entrance -77.0365 38.8977 30

That assumes datum WGS84 (which is what your GPS probably gives you by
default).

You can't use lat/long as the output coordinate system, as that needs to
use length units.  I don't know off-hand if therion picks a suitable
one for you - if not, you'll need to specify a suitable output
coordinate system in your config file - e.g. 'cs utm<NN>' where <NN> is
the UTM zone you are in.

Cheers,
    Olly