[udig-devel] A unique colour for each Feature

Jody Garnett jgarnett at refractions.net
Wed Feb 7 13:39:43 PST 2007


Good to know - this is the first time it has come up as a feature 
request on the email list. If two of you need it we can offer some 
design advice if you want to code together.
Jody
> I'm trying to move a demo application from ArcExplorer to uDig and 
> this is one of the things that it was able to do easily and I couldn't
> figure out how to do this in uDig.
>
> Andrea Antonello wrote:
>> Jody, you are right :)
>> (and thanks Paul to give a support in this)
>>
>> I asked because that was the first thing a guy used to use Arcview,
>> Geomedia and Microstation (he knows what he is doing usually) asked me
>> when I showed him udig.
>> Since I sometimes wonder of particular requests because I develop and
>> use too less, I wanted to know if someone misses the feature :)
>> I'm sure people are just afraid to say it, but they all like that
>> almost-nothing-stating map ;)
>>
>> Cheers,
>> Andrea
>>
>>
>>
>> Jody Garnett wrote:
>>  
>>> As you can see Andrea - we are in the realm of art and communication 
>>> :-)
>>>
>>> You are correct Paul (and yes I looked at the map).
>>> - pale colours used
>>> - colours assigned spatially so that no two regions that touch have the
>>> same colour
>>> - border is thickened up with a bolder version of the same colour (to
>>> make differences apparent)
>>>
>>> I recall reading about this cartographic problem somewhere - it was an
>>> exercise in graph theory.
>>> Fun stuff, but now back to work.
>>> Jody
>>>
>>>    
>>>> Tut, tut, Mr Garnett, "effectively" is in the eye of the beholder.
>>>> Check out the national geographic map at the front of the office, for
>>>> an example of what Andrea is requesting. It is a not-uncommon
>>>> cartographic trope, and if done subtly, not uneffective.
>>>>
>>>> P
>>>>
>>>> Jody Garnett wrote:
>>>>      
>>>>>  If your point is that all the parishes are *different* then you can
>>>>> do that
>>>>> more effectively by coloring them the same and using a thicker
>>>>> contrasted border (border emphasis the difference rather then the
>>>>> color changes - an easy example is that somewhere on your map of
>>>>> Italy two parishes will end up with colours so close that
>>>>> the eye will not be able to notice the difference and this they will
>>>>> be joined visually).
>>>>>         
>>>>       
>>> _______________________________________________
>>> User-friendly Desktop Internet GIS (uDig)
>>> http://udig.refractions.net
>>> http://lists.refractions.net/mailman/listinfo/udig-devel
>>>
>>>     
>>
>>   
>
>
> _______________________________________________
> User-friendly Desktop Internet GIS (uDig)
> http://udig.refractions.net
> http://lists.refractions.net/mailman/listinfo/udig-devel



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