[QGIS-Developer] QGIS 3.8 Transformations dialog

[Nathan Woodrow]

NIce work! Pretty handy having that map in there.

On Mon, Jul 8, 2019 at 10:13 AM Nyall Dawson <nyall.dawson at gmail.com> wrote:

> On Mon, 1 Jul 2019 at 11:11, Nyall Dawson <nyall.dawson at gmail.com> wrote:
> >
> > On Fri, 28 Jun 2019 at 17:29, Nyall Dawson <nyall.dawson at gmail.com>
> wrote:
> > >
> > > On Fri, 28 Jun 2019 at 17:11, Richard Duivenvoorde <
> rdmailings at duif.net> wrote:
> > > >
> > > > On 28/06/2019 01.28, Nyall Dawson wrote:
> > > > >> That one shows 'just' 2 options (added to the qgis.nl post)
> > > > >> IF the green line is just the first one, but we are not sure if
> it is
> > > > >> the right one... should we make it green anyway?
> > > >
> > > > > Ah, on proj 6 builds, we ARE sure that the first/green one is the
> most
> > > > > recommended one :) That's because proj gives us an ordered list of
> > > > > possible operations in order of preference (calculated using all
> > > > > proj's internal smarts and knowledge about the accuracy of
> different
> > > > > transform operations).
> > > >
> > > > Mmm, then my last question, after this I'll move to proj ;-)
> > > >
> > > > See:
> > > >
> > > >
> http://www.qgis.nl/media/2019/06/Screenshot-20190627104509-716x467.png
> > > >
> > > > This is QGIS with proj6: As you see there are 2 options. The first
> one
> > > > being green 'numbered' (3). But the bottom one having a higher number
> > > > between brackets having a (4) between brackets?
> > > >
> > > > Now /me wondering what these numbers are: because given your answer
> > > > above, the green one being 'THE one' :-) I wonder what this other
> > > > numbers are (I was wondering ordered by date/relevance or so)??
> > >
> > > These are how proj identifies the coordinate operation -- I'm not
> > > entirely sure what they represent, but I assume they are just indexes.
> >
> > Just for followers of this thread - conversation moved to the proj
> > mailing list, and looks like it will result in improved descriptive
> > strings coming as a result...
>
> Following all this discussion, here's a quick comparison of before vs
> current:
> Before:
> http://www.qgis.nl/media/2019/06/Screenshot-20190627104509-716x467.png
> Now:
> https://user-images.githubusercontent.com/1829991/60775333-f4f4db80-a164-11e9-8076-225ba2322aba.png
>
> Iterative design at its finest ;)
>
> Nyall
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