[QGIS-Developer] Vote for Lat Lon Tools Default Coordinate Order - YX or XY

[Syd Visser]

In the 1970 to early 1980 when I started working with computers almost 
everything was N E and Lon Lat. Z was also positive down and azimuth 
positive from North to East (good old right hand rule) since most of the 
work was for drilling or mine workings this worked fine.

If you look back at grass3 or 4 it was mostly N E. But somewhere in the 
1990 almost everything changed to E N and Lat Lon and Z up and by grass6 
I think everything was converted. I am not sure why this happened or 
what the reasoning was maybe because some GIS people started realizing 
the earth was not flat. All of this was fine except that the Azimuth did 
not change so the real problem now is that the azimuth is still positive 
from North to East. So personally to get things right instead of left I 
think the Azimuth should now change to being positive from East to North 
or at least North to West. Good luck with that.

Syd

*Syd (Sipke) Visser, P.Geo.*
President, Snr. Geophysicist/Geologist

Tel: 1 (604) 582-1100
Cell: 1 (604) 813-1440
sydv at sjgeophysics.com
www.sjgeophysics.com <http://www.sjgeophysics.com>


<http://www.sjgeophysics.com>

On 2020-11-21 10:45 a.m., C Hamilton wrote:
> I appreciate everyone's ideas and opinions. I think that for now I 
> will leave Lat Lon Tools as it currently operates, but I will look 
> over the suggestions to see if I can make sure the options are as 
> clear as possible.
>
> Thanks once again for your input.
>
> Calvin
>
>
> On Sat, Nov 21, 2020 at 3:52 AM Richard Duivenvoorde 
> <rdmailings at duif.net <mailto:rdmailings at duif.net>> wrote:
>
>     On 11/20/20 6:10 PM, C Hamilton wrote:
>     > It was suggested to me that the default coordinate order in the
>     Lat Lon Tools plugin for coordinate capture and zoom-to tools
>     should be "longitude, latitude" or "X, Y". Originally, Lat Lon
>     Tools was designed to work with on-line maps which are generally
>     "latitude, longitude" order.
>     >
>     > You can always go into the plugin settings and specify which
>     order you want and that order will be preserved everytime you
>     launch QGIS. The default order is only applicable the first time
>     you install "Lat Lon Tools" or if you do a reset to defaults in
>     the Lat Lon Tools settings menu,
>     >
>     > Who prefers Lat Lon Tools to default to "longitude, latitude" or
>     "X, Y" when the plugin is first installed or reset to default values?
>     >
>     > Who prefers Lat Lon Tools to default to "latitude, longitude
>     (Google map order)" or "Y, X" when the plugin is first installed
>     or reset to default values?
>
>     I'm a little late on the table :-) As descision already cast:
>     https://github.com/NationalSecurityAgency/qgis-latlontools-plugin/issues/53#issuecomment-731070055
>     and fine with it, just want to add:
>
>     I'm not a geo-guy by original trade and working with
>     scientists/911 peeps at the moment, who favour the math-way of
>     exchanching coordinates (2 dimensional values): X,Y.
>
>     If I were 'boss geo', I'd never use lonlat or latlon terms, only
>     use (decimal!) degrees or x,y :-)
>     (people tend to mix lat lon up all the time, they never do with x,y).
>
>     In my use-case, the Lat Lon Tools plugin is used in a very
>     pluriform, international environment where coordinates from all
>     kind of crs's are to be mixed/converted (often one pair at a
>     time...). Why would you use YX in one crs and XY in other crs's?
>     It's just not very efficient to have that choice. Just like
>     meters/feet, point/comma delimeters in numbers etc etc. This
>     screams for conversion issues ...
>
>     Ah, and while on it, let's all speak Esparanto (and keep the
>     number of QGIS translation builds low) ;-)
>
>     Korajn salutojn,
>
>     Richard Duivenvoorde
>
>
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