[mapguide-trac] #1068: Gaps in reprojected raster

[MapGuide Open Source]

#1068: Gaps in reprojected raster
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   Reporter:  beginbenoit        |       Owner:                               
       Type:  defect             |      Status:  new                          
   Priority:  medium             |   Milestone:                               
  Component:  Rendering Service  |     Version:  2.1.0                        
   Severity:  major              |    Keywords:  raster,reprojection,rendering
External_id:                     |  
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 When raster images are reprojected, it seems to leave gaps depending on
 the type of reprojection being done. My map is in CANQ-LCC-83 (Quebec;
 Lambert Conformal Conic projection, NAD 83 datum). The attached screenshot
 shows an ECW composite layer in a CANQ-M7 (NAD83 Zone 7, Metre; Quebec 72
 to 69 deg West). I have also attached the config XML of the raster
 FeatureSource to give further details.

 What I think happens is that Mapguide retrieves the extent it needs for
 the raster, then reprojects the raster image afterwards. Depending on the
 transformation, this leaves some gaps on the sides as the reprojection
 skews the raster smaller than the actual extent that is being seen by the
 user.

 I had to blur out some things in the screenshot and change some path due
 to the confidential nature of some of the information, but from a
 technical standpoint everything is the same.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1068>
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