[PROJ] Latitude of natural origin in Transverse Mercator

[Javier Jimenez Shaw]

Thanks Charles. That's very useful
.___ ._ ..._ .. . ._.  .___ .. __ . _. . __..  ... .... ._ .__
Entre dos pensamientos racionales
hay infinitos pensamientos irracionales.



On Fri, 13 Jan 2023 at 16:13, Charles Karney <charles.karney at gmail.com>
wrote:

> These are two interchangeable ways of shifting the northing component of
> the projected coordinate.  Mathematically they both do exactly the same
> thing and there's nothing the matter with specifying both a latitude of
> origin and false northing.  Indeed the Ordnance Survey grid system for
> Britain specifies
>
>   central longitude = -2 deg
>   latitude of origin = 49 deg
>   false northing = - -100 km
>
> This means that a shift is added to the northing component to ensure
> that the northing at latitude/longitude = (49 deg, -2 deg) is -100 km.
>
>
> On 1/13/23 09:28, Javier Jimenez Shaw wrote:
> > Hi
> >
> > I have a question about Transverse Mercator.
> > What is the impact of the parameter "Latitude of natural origin",
> > compared with the "False Northing"? (apart from the fact that one is in
> > degrees and the other in meters)
> > Is there any difference on using a Latitude of natural origin of, let's
> > say, 40 degrees, or compute the equivalent False Northing?
> >
> > Thanks.
> > Javier
> > .___ ._ ..._ .. . ._.  .___ .. __ . _. . __..  ... .... ._ .__
> > Entre dos pensamientos racionales
> > hay infinitos pensamientos irracionales.
> >
> >
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>
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