[QGIS-trac] [Quantum GIS] #2906: Scaling of values used in "Area scale" (or "Size scale field")

[Quantum GIS]

#2906: Scaling of values used in "Area scale" (or "Size scale field")
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   Reporter:  nikos                                                        |              Owner:  nobody       
       Type:  enhancement                                                  |             Status:  new          
   Priority:  critical: causes crash or data corruption                    |          Milestone:  Version 1.6.0
  Component:  Symbology                                                    |            Version:               
   Keywords:  points, symbols, area scale, size scale field, scale factor  |   Platform_version:               
   Platform:  All                                                          |           Must_fix:  No           
Status_info:  0                                                            |  
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 The point layer properties offers the possibility to draw symbols by
 field(s), i.e. Area scale (also known as "Size scale field" in the "New
 symbology" dialog).

 It would be nice to have the option to further scale the selected field by
 a scale factor, i.e. multiply by 0.1, by 10, etc.

 To mention an example why this would be useful: I would like to scale the
 size of point-symbols that correspond to climatic stations according to
 precipitation measurements. Currently it is required to experiment with
 the values of interest (e.g. multiplying them by 0.1, 0.01, etc.) to gain
 a new set of values that will give symbols that fit in to the picture but
 still reflect the differences of the measured precipitation between the
 stations.

 This enhancement will save a lot of time.

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/2906>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats