[fdo-trac] #94: Generate extent for features assigned to default spatial context

[FDO]

#94: Generate extent for features assigned to default spatial context
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   Reporter:  mloskot           |       Owner:  mloskot
       Type:  defect            |      Status:  new    
   Priority:  major             |   Milestone:  3.3.0  
  Component:  PostGIS Provider  |     Version:  3.2.0  
   Severity:  3                 |    Keywords:         
External_id:                    |  
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 If a feature class (table) belongs to default spatial context (SRID =
 '''-1''') then spatial extent is also set according to default extent with
 min values set to -10000000 and max values set to 10000000.

 This is not optimal for clients so it's highly suggested to assign real
 extent to such feature classes using default spatial context.

 For better performance, spatial extent is estimated during maintenance
 operation which update query planner statistics, so users will be required
 to run VACUUM or ANALYZE frequently. Otherwise, spatial extent is set
 Zeros or big-default-values.

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Ticket URL: <http://trac.osgeo.org/fdo/ticket/94>
FDO <http://fdo.osgeo.org/>
Feature Data Objects