19 class CObservation2DRangeScan;
 
   20 class CObservation3DRangeScan;
 
   21 class CObservationVelodyneScan;
 
   22 class CObservationRange;
 
   23 class CObservationBeaconRanges;
 
   24 class CObservationBearingRange;
 
   25 class CObservationStereoImages;
 
   26 class CObservationGPS;
 
   32 class CSimplePointsMap;