BUG: Put back KeywordList in image writing process

Modules/IO/IOGDAL/src/otbGDALImageIO.cxx

@@ -1538,6 +1538,26 @@ void GDALImageIO::InternalWriteImageInformation(const void* buffer)
       CSLDestroy(rpcMetadata);
       }
     }
+    // ToDo : remove this part. This case is here for compatibility for images
+    // that still use Ossim for managing the sensor model (with OSSIMKeywordList).
+    else if (otb_kwl.GetSize())
+      {
+      /* -------------------------------------------------------------------- */
+      /* Set the RPC coeffs (since GDAL 1.10.0)                               */
+      /* -------------------------------------------------------------------- */
+      if (m_WriteRPCTags)
+        {
+        GDALRPCInfo gdalRpcStruct;
+        if (otb_kwl.convertToGDALRPC(gdalRpcStruct))
+          {
+          otbLogMacro(Debug, << "Saving RPC to file (" << m_FileName << ")")
+          char** rpcMetadata = RPCInfoToMD(&gdalRpcStruct);
+          dataset->SetMetadata(rpcMetadata, "RPC");
+          CSLDestroy(rpcMetadata);
+          }
+        }
+      }
+
   /* -------------------------------------------------------------------- */
   /* Case 3: Set the GCPs                                                 */
   /* -------------------------------------------------------------------- */

Modules/IO/ImageIO/include/otbImageFileWriter.hxx

@@ -553,6 +553,7 @@ void ImageFileWriter<TInputImage>::GenerateOutputInformation(void)
   }
 
   m_ImageIO->SetUseCompression(m_UseCompression);
+  m_ImageIO->SetMetaDataDictionary(inputPtr->GetMetaDataDictionary());
 
   const ImageCommons* img_common = dynamic_cast<const ImageCommons*>(inputPtr.GetPointer());
   if (img_common != nullptr)