[Proj] Lambert Azimuthal Equal Area scale
Lourens Veen
l.e.veen at uva.nl
Thu Jun 11 07:22:28 PDT 2015
On 10/06/15 17:41, Lourens Veen wrote:
> I'll check everything again tomorrow, this time with lon and lat in the
> right order for invgeod to understand it correctly. I agree that geod
> should be fixed, both geod and proj are libproj utilities, they should
> correctly interpret each other's default output format.
Well, I reversed lat and lon, and I'm getting much more reasonable
results now. I'm still getting a discrepancy between GeographicLib and
proj though:
proj 4.8.0: (Ubuntu package)
$ invgeod +ellps=WGS84 +units=m
43.948780899203733 -153.87240094587023 44.036369120054417
-153.93214592316059
-26d7'4.466" 153d50'26.145" 10861.026
GeographicLib-1.42 (from source)
$ GeodSolve -i
43.948780899203733 -153.87240094587023 44.036369120054417
-153.93214592316059
-26.19689664 -26.23839343 10848.141
For my purposes, a 15m difference is not such a problem, but I'd like to
be sure that this is a precision issue, rather than a mistake on my part
somewhere. Perhaps this is why there's a new backend in 4.9.0?
Thanks,
Lourens
--
ir. Lourens Veen - PhD Student - UvA-IBED-CGE
m: P.O. Box 94248, NL-1090 GE Amsterdam
t: +31 (0)20-5258293
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