[mapguide-trac] #968: Preview FeatureSource depends on Aggregates

[MapGuide Open Source]

#968: Preview FeatureSource depends on Aggregates
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   Reporter:  ksgeograf  |       Owner:                                     
       Type:  defect     |      Status:  new                                
   Priority:  low        |   Milestone:                                     
  Component:  General    |     Version:  2.1.0                              
   Severity:  trivial    |    Keywords:  preview viewer aggregate OGR extent
External_id:             |  
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 The FeatureSource Preview has been updated to use the actual contents of
 the datasource for determining the preview extent. This is optimal for
 most FeatureSources, but some providers (like the OGR provider) does not
 support the requested aggregates.

 There should be a fallback method to use the spatial extent from the
 spatial context, if the aggregate function fails, as that is better than
 no preview at all (and actually correct for the OGR provider).

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/968>
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