jgg     2013 33 (4):  79-82    ISSN: 0412-1961  CN: 21-1139/TG TERRAIN RENDERING TECHNOLOGY BASED ON GEOMETRY CLIPMAP 1) Military Simulation Technology Institute, Aviation University of Air Force, Changchun 130022 2) Base of Flight Training, Aviation University of Air Force, Changchun 130022 3) Armament Department, Aviation University of Air Force, Changchun 130022 4) Aeronautics & Astronautics Intelligence Department, Aviation University of Air Force, Changchun 130022 Received: 2013-01-18  Revised: null  Online: 2013-08-16 Supporting info