[Qgis-user] Lat Lon Tools question

[Eric Sorensen]

As Greg and others point out, I appear to be using the UTM zone term inappropriately.  My apologies.

What I am after in my label, is the MGRS flavor that includes the latitude band, and agrees with the image shown in this link;

https://docs.qgis.org/3.4/en/_images/utm_zones.png <https://docs.qgis.org/3.4/en/_images/utm_zones.png>

After you folks successfully educated me on this, I came up with the following;

concat(name, ', ',  mgrs_gzd($Y, $X), ' ',   format_number(utm_east( $Y, $X), 0), ' ',  format_number(utm_north( $Y, $X), 0))

Which gets me a label like this for the point I originally supplied;
Park, 13S 384,258 3,974,547

This is how my Garmin GPS displays coordinates of waypoints (sans the commas), and how someone would input the point into their gps, after I hand them a map I have created in QGIS.  Now to eliminate the commas.

Thank you all for your input,
es


> On Feb 6, 2021, at 11:41 AM, Greg Troxel <gdt at lexort.com> wrote:
> 
> 
> Eric Sorensen <e.b.s at me.com> writes:
> 
>>  <wpt lat="35.908381976187229" lon="-106.282681999728084">
>>    <ele>2262.188964999999826</ele>
> 
>> The labels appear as expected, except one small problem.  I know the points are in UTM zone 13S, yet the label shows zone 13N.
>> 
>> Any thoughts on what I am doing wrong.
> 
> That latitude is north, and in New Mexico.  Why do you think it's zone
> 13S?
> 
> <pause to read>
> 
> Beware of the confusion between grid zones from MGRS, not technically
> part of UTM, and UTM north/south.  See
> 
>  https://en.wikipedia.org/wiki/Universal_Transverse_Mercator_coordinate_system#Notation
> 
> So it seems the UTM output uses S and N -- which is what I would expect
> for straight UTM without a MGRS flavor.
> 
> If you moved north, you could be in 13T, from 40-48 degrees, and not
> have this issue, but then you'd have more snow :-)
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20210206/121b965d/attachment.html>