[Qgis-developer] Complex symbology: multiple classifications for different graphical variables

[Nathan Woodrow]

Sure thing.  You can assign it to me if you would like and when I get time
I will update it with information on what I come up with.

- Nathan


On Wed, Nov 28, 2012 at 7:33 PM, Andreas Neumann <a.neumann at carto.net>wrote:

> Hi Nathan,
>
> Thank you for putting some thoughts into this problem.
>
> Should I open a feature request ticket?
>
> Andreas
>
>
> On Tue, 27 Nov 2012 19:56:27 +1000, Nathan Woodrow wrote:
>
>> Yes I agree this would be very handy and something I was thinking
>> about how to tackle today.  Larry has been working on some stuff for
>> the data-defined labels to make it easier to use from the UI and the
>> code so I'm thinking we can use the same code for that in the symbols.
>>
>> I would also like to be able to bind controls together, things like
>> fill and outline so they always stay in sync.  I have a few ideas how
>> this could work so I'm going to try and have a go at some stage, or at
>> least draft up the idea more.
>>
>> - Nathan
>>
>> On Tue, Nov 27, 2012 at 6:35 PM, Andreas Neumann  wrote:
>>
>>  Hi,
>>>
>>> In many of my projects I need to do several classifications for
>>> different graphical variables, like fill-color, stroke-color, size,
>>> orientation, etc.
>>>
>>> As an example I need to represesent manholes where the symbol shape
>>> (SVG) is based on manhole type, the symbol stroke colors based on
>>> the usage, and the size based on dimensions.
>>>
>>> I know that it is currently possible to reach this goal by either
>>>
>>> * using the rule based renderer - it would result in a lot of rules
>>> or refined rules - a lot of work
>>> * or concatenating the three attribute values into one attribute
>>> and using the unique value renderer - but this results in many, many
>>> combinations. Too many classes to handle.
>>>
>>> So my question/suggestion:
>>>
>>> Can we introduce multiple parallel/simultaneous categorized
>>> classifications where each attributes controls one visual variable?
>>>
>>> I don't know how one could display a legend then with such parallel
>>> classifications ... but other than that it would be more convenient
>>> for the user.
>>>
>>> There may also be technical issues making this impossible.
>>>
>>> Any thoughts on this?
>>>
>>> Andreas
>>>
>>> --
>>> --
>>> Andreas Neumann
>>> Böschacherstrasse 10A
>>> 8624 Grüt (Gossau ZH)
>>> Switzerland
>>> ______________________________**_________________
>>> Qgis-developer mailing list
>>> Qgis-developer at lists.osgeo.org [1]
>>> http://lists.osgeo.org/**mailman/listinfo/qgis-**developer<http://lists.osgeo.org/mailman/listinfo/qgis-developer>[2]
>>>
>>
>>
>>
>> Links:
>> ------
>> [1] mailto:Qgis-developer at lists.**osgeo.org<Qgis-developer at lists.osgeo.org>
>> [2] http://lists.osgeo.org/**mailman/listinfo/qgis-**developer<http://lists.osgeo.org/mailman/listinfo/qgis-developer>
>> [3] mailto:a.neumann at carto.net
>>
>
> --
> --
> Andreas Neumann
> Böschacherstrasse 10A
> 8624 Grüt (Gossau ZH)
> Switzerland
>
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