<div dir="ltr"><div>Thanks Charles. That's very useful<br></div><div><div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature">.___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__<br>Entre dos pensamientos racionales <br>hay infinitos pensamientos irracionales.<br><br></div></div><br></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, 13 Jan 2023 at 16:13, Charles Karney <<a href="mailto:charles.karney@gmail.com">charles.karney@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">These are two interchangeable ways of shifting the northing component of<br>
the projected coordinate. Mathematically they both do exactly the same<br>
thing and there's nothing the matter with specifying both a latitude of<br>
origin and false northing. Indeed the Ordnance Survey grid system for<br>
Britain specifies<br>
<br>
central longitude = -2 deg<br>
latitude of origin = 49 deg<br>
false northing = - -100 km<br>
<br>
This means that a shift is added to the northing component to ensure<br>
that the northing at latitude/longitude = (49 deg, -2 deg) is -100 km.<br>
<br>
<br>
On 1/13/23 09:28, Javier Jimenez Shaw wrote:<br>
> Hi<br>
> <br>
> I have a question about Transverse Mercator.<br>
> What is the impact of the parameter "Latitude of natural origin", <br>
> compared with the "False Northing"? (apart from the fact that one is in <br>
> degrees and the other in meters)<br>
> Is there any difference on using a Latitude of natural origin of, let's <br>
> say, 40 degrees, or compute the equivalent False Northing?<br>
> <br>
> Thanks.<br>
> Javier<br>
> .___ ._ ..._ .. . ._. .___ .. __ . _. . __.. ... .... ._ .__<br>
> Entre dos pensamientos racionales<br>
> hay infinitos pensamientos irracionales.<br>
> <br>
> <br>
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</blockquote></div>