[Qgis-developer] Help with projections

Andreas Neumann a.neumann at carto.net
Wed Jan 13 03:50:00 PST 2016


The coolest thing to have regarding projections for small scale data 
would be the "Adaptive composite map projection" developed by folks from 
the University of Oregon.

It is developed with the MIT license and could be re-used by QGIS.

See https://github.com/OSUCartography/adaptive-composite-map-projections 
or Google for it to see demos/videos. 
is a good start. A demo is at 

As far as I know, ESRI has plans to include this in their products. We 
could do the same if we want.


On 13.01.2016 10:58, Werner Macho wrote:
> Hi all,
> however we are going to solve this ..
> +1 for better projection support.
> reason: there are a lot of downloadable shapefiles by austrian
> government which are obviously produced by ESRI products (with
> austrian projection) - but when I load them in QGIS I still get
> "custom projection" with the same parameters as the austrian
> projection (I think it was 31259). So there must be something wrong
> with projection recognition.
> So beside the better projection CHOICE support - there is still some
> thing to do ..
> regards
> Werner
> On Wed, Jan 13, 2016 at 9:41 AM, Andreas Neumann <a.neumann at carto.net> wrote:
>> Hi Paolo,
>> I think it would be worth to have better projection choice support in QGIS.
>> It is really hard to select proper projections, esp. for new users. We also
>> lack some useful worldwide projections in our proj4 database.
>> One could have a d3.js based preview for world-wide projections.
>> Would be a good thing for a GSOC project, I think.
>> Andreas
>> On 13.01.2016 09:23, Paolo Cavallini wrote:
>>> Il 13/01/2016 08:24, Paolo Cavallini ha scritto:
>>>> Hi all,
>>>> during courses, a frequent question is how to find the correct
>>>> projection for layers without a .prj or similar.
>>>> An interesting approach is this: http://projfinder.com/
>>> BTW, this particular implementation does not work, as it seems to be
>>> strongly biased towards North America.
>>> The idea is still valid, however.
>>> All the best.
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