[Qgis-user] Polygon coloring
Andreas Neumann
a.neumann at carto.net
Fri Oct 4 05:12:20 PDT 2013
Hi,
Note that there is a fundamental difference between a drawing package
and GIS.
In a GIS you usually do not store graphical properties (like color,
stroke-width, pattern, text settings, etc.) directly in the data. You
would define rules how the data is styled, which are derived from your
data columns. This way you can easily create different variations
derived from the same data. A rule can be a category, a range or a more
complex rule as you can define it with the expression builder.
In a drawing package (like Illustrator, Inkscape or CAD) you directly
store the graphical properties with each object with the consequence
that it is much harder to create different visualization based on the
same data.
Hope this helps.
Andreas
Am 04.10.2013 12:02, schrieb Jonathan Moules:
> If you google around ("qgis manual download pdf") there are several PDF
> documents. I doubt any are for 2.0, but for basic stuff QGIS hasn't changed
> too much between versions. I.e.:
> http://manual.linfiniti.com/
> http://nathanw.net/2013/01/06/qgis-manuals/
>
> etc.
>
> Jonathan
>
>
> On 3 October 2013 11:27, KLGan <1klgan at gmail.com> wrote:
>
>> Thanks Andreas,
>>
>> I am new to QGIS, and for a moment thought this is not possible. Glad to
>> know these are basic stuffs in gis :-)
>>
>> Will browse the manual (how I wish the manual is available for download)
>>
>> Thanks
>>
>> KLGan
>>
>>
>> On 3 October 2013 17:54, Andreas Neumann <a.neumann at carto.net> wrote:
>>
>>> Hi,
>>>
>>> This is very basic GIS stuff. Please consult the QGIS manual for this.
>>>
>>> As a hint:
>>>
>>> You need to define either of:
>>>
>>> * a rule
>>> * a category
>>> * assign a column that contains color values
>>>
>>> These are available in the layer properties and in the "Styles" tab.
>>>
>>> All of these are described in the QGIS manual:
>>>
>>> http://www.qgis.org/en/docs/user_manual/working_with_vector/vector_properties.html#style-menu
>>>
>>> Good luck,
>>> Andreas
>>>
>>> Am 03.10.2013 09:44, schrieb KLGan:
>>>> Hi,
>>>>
>>>> I have a layer with many polygons. I want to change the color of some of
>>>> the polygons. How can I do this in QGIS?
>>>>
>>>> Currently changes apply to all the polygons, not individual one.
>>>>
>>>> Thanks :-)
>>>>
>>>> KLGan
>>>>
>>>>
>>>>
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