descriptor->AddOption("DEMDirectory","Directory were to find the DEM tiles","dem",1,false,otb::ApplicationDescriptor::DirectoryName);
descriptor->AddOption("LocMapSpacing","Generate a coarser deformation field with the given spacing.","lmSpacing",1,false,otb::ApplicationDescriptor::Real);
descriptor->AddOption("AvailableMemory","Set the maximum of available memory for the pipeline execution in mega bytes (optional, 256 by default)","ram",1,false,otb::ApplicationDescriptor::Integer);