Elements in Reference CategorySave PDFSave selected topicSave selected topic and subtopicsSave all topicsShareShare to emailCopy topic URLLast UpdatedFeb 24, 2022EngineeringUnified EngineeringEngineering (Unified Engineering) Related LinksBoundaries and Roadways Element (BOUNDARY)Datum Point Element (DATUM)Ground Model Element (GRDMODEL)Penalty or Preferred Volume Element (PVOLUME)Routing Plane Element (RPLANE)Routing Plane Element (RPLGROUP)Sub Volume Model Element (SVOLMODEL)Volume Model Element (VOLMODEL)