[webservices] distaz

[Philip Crotwell]

Hi

I am not sure, but I suspect what you are seeing is the effect of an
ellipticity correction.

If you want code to calculate distance, I have routines in java, c,
fortran and python here that might be of use. Distance is such a small
calculation that it might be better done locally.

http://www.seis.sc.edu/software/distaz/

Philip

On Wed, Nov 16, 2011 at 7:20 AM, Denton, Paul <pdenton at bgs.ac.uk> wrote:
> Does anyone know what earth model the distaz webservice uses to calculate
> distances (all I can tell is that it appears not to be a spherical earth
> model)
>
> Thanks
>
> Paul Denton
> UK school seismology project leader
> British Geological Survey
> Keyworth
> Nottingham NG12 5GG
> email pdenton at bgs.ac.uk
> web  www.bgs.ac.uk/ssp
>
>
>
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