Re: [Qgis-user] about some ellipsoïdal distances

G. Allegri giohappy at gmail.com
Fri Apr 6 03:20:22 PDT 2012


And ticket:  http://hub.qgis.org/issues/5329

2012/4/6 G. Allegri <giohappy at gmail.com>

> Pull request done:  https://github.com/qgis/Quantum-GIS/pull/115
>
> giovanni
>
>
> 2012/4/6 Paolo Cavallini <cavallini at faunalia.it>
>
>> Il 06/04/2012 12:01, G. Allegri ha scritto:
>> > Probably I've found the bug.
>> > In Qgis the semi-minor axis of the ellipsoid is calculated with:
>> >
>> > b = a - (f/a)
>> >
>> > where
>> > b = semi-minor axis
>> > a = semi-majot axis
>> > f = inverse flattening
>> >
>> > while it should be:
>> >
>> > b = a - (a/f)
>> >
>> >
>> > In Qgis the WGS84 semi-minor axis is 6378136,xxx
>> > while it should be 6356752.xxx
>>
>> nice shot, thanks a lot!
>> could you please fill up a ticket, or change the code yourself and send a
>> pull request?
>> all the best.
>>
>> --
>> Paolo Cavallini - Faunalia
>> www.faunalia.eu
>> Full contact details at www.faunalia.eu/pc
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>>
>
>
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