[QGIS-trac] Re: [Quantum GIS] #960: Area scale field: make standardized symbol dimension and legend

[Quantum GIS]

#960: Area scale field: make standardized symbol dimension and legend
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        Reporter:  giohappy                         |         Owner:  homann                            
            Type:  enhancement                      |        Status:  new                               
        Priority:  minor: annoyance or enhancement  |     Milestone:  Version 1.0.0                     
       Component:  Symbology                        |       Version:  HEAD                              
      Resolution:                                   |      Keywords:  area scale field, graduated points
Platform_version:                                   |      Platform:  All                               
        Must_fix:  No                               |   Status_info:  1                                 
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Comment (by giohappy):

 Hi Tim.
 I'm referring to the symbology option for punctual features, that lets you
 choose a single layer whose dimension (and rotation) may be controlled by
 means of a selected attribute.
 You can choose a not better defined "dimension" factor that applies to the
 symbols size proportionally to the attribute value. Now, if you have huge
 values you can get enormous balloons even if you set the minimum
 "dimension" (by default the lower limit is 3).
 I think it could be better to stanrdardize the dimensions of the symbols
 on the basis of a minimum-maximum value.
 In this way the user could choose the best visualization it needs.

 In formula it could be:
 (attribute_value - min_dimension)/(max_dimension-min_dimension)
 or something similar...

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/960#comment:2>
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