[fdo-trac] #15: Missing Raster Extents

[FDO]

#15: Missing Raster Extents
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   Reporter:  warmerdam      |       Owner:  warmerdam
       Type:  defect         |      Status:  new      
   Priority:  major          |   Milestone:  3.3.0    
  Component:  GDAL Provider  |     Version:  3.2.0    
   Severity:  2              |    Keywords:           
External_id:                 |  
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 MapGuide does not know the default extents for raster data coming from the
 GDAL raster
 provider.

 Traian reports:
 {{{
 You need to make sure that your FdoISpatialContextReader::GetExtent()
 returns correct extents for the rasters you are connected to. If it
 already does that, then we would have to dig deeper, but I think that
 should be sufficient.

 Fyi, this is what I am using in the OGR provider, and it works most of the
 time:

 FdoByteArray* OgrSpatialContextReader::GetExtent()
 {
 OGREnvelope e;
 /*OGRErr err =*/
 m_connection->GetOGRDataSource()->GetLayer(m_nIndex)->GetExtent(&e, TRUE);

 //generate FGF polygon and return as refcounted byte array
 double coords[10];
 coords[0] = e.MinX;
 coords[1] = e.MinY;
 coords[2] = e.MaxX;
 coords[3] = e.MinY;
 coords[4] = e.MaxX;
 coords[5] = e.MaxY;
 coords[6] = e.MinX;
 coords[7] = e.MaxY;
 coords[8] = e.MinX;
 coords[9] = e.MinY;
 FdoPtr<FdoFgfGeometryFactory> gf = FdoFgfGeometryFactory::GetInstance();
 FdoPtr<FdoILinearRing> lr = gf->CreateLinearRing(FdoDimensionality_XY, 10,
 coords);
 FdoPtr<FdoIPolygon> fgfgeom = gf->CreatePolygon(lr, NULL);
 return gf->GetFgf(fgfgeom);
 }
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/fdo/ticket/15>
FDO <http://fdo.osgeo.org/>
Feature Data Objects