[mapguide-trac] #538: Problem with creation of buffer from multiple context FDO

[MapGuide Open Source]

#538: Problem with creation of buffer from multiple context FDO
------------------------------+---------------------------------------------
   Reporter:  jcsilva         |       Owner:     
       Type:  defect          |      Status:  new
   Priority:  medium          |   Milestone:     
  Component:  Viewer Command  |     Version:     
   Severity:  major           |    Keywords:     
External_id:                  |  
------------------------------+---------------------------------------------
 When creating a buffer with the .net viewer, from an FDO source with more
 than one coordinate system context, the buffer.aspx assumes the first
 context for the buffer measure, not the selected features context.

 In a case where the selected features are in a projected context, but the
 first context of the feature source is lat lon, one of two things happen:
 1) The merge flag is active: There's a memory usage peak and the buffer
 fails.
 2) The merge flag is inactive: There's no failure, but no buffer creation.

 The buffer.aspx, buffer.jsp and buffer.php must be corrected to calculate
 the measure in the selected features coordinate context. Not the first one
 on the list.

 This is as it is now:
 {{{
 MgResourceIdentifier featSourceId = new
 MgResourceIdentifier(selLayer.GetFeatureSourceId());
 MgSpatialContextReader ctxs = featureSrvc.GetSpatialContexts(featSourceId,
 false);
 String srsDefDs = "";
 if (ctxs != null && ctxs.ReadNext())
     srsDefDs = ctxs.GetCoordinateSystemWkt();
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/mapguide/ticket/538>
MapGuide Open Source <http://mapguide.osgeo.org/>
MapGuide Open Source Internals