CASM ZC  CASM TOPRS UAVs are Chinese UAVs developed by China TopRS Technology Co., Ltd. (TopRS, 中测新图遥感技术有限责任公司), a wholly owned division/subsidiary of Chinese Academy of Surveying and Mapping (CASM, 中国测绘科学研究院). ZC-1 UAV is a fixed-wing UAV developed by TopRS in conventional layout with high-wing configuration and tricycle landing gear. Propulsion is provided by a two-blade propeller driven by a tractor engine mounted in the nose. ZC-1 is usually launched via catapult, and it has been deployed by Chinese governmental agencies for aerial survey missions in Gansu and Sichuan  ZC-2 UAV is a fixed-wing UAV developed by TopRS in conventional layout with high wing configuration, and it is constructed of wood. Propulsion is provided by a two-blade propeller driven by a gasoline tractor engine mounted in the nose. ZC-2 UAV has been deployed for aerial survey missions in diverse regions from Lhasa to Fujian. Specification:  ZC-3 UAV is an electrically powered micro air vehicle (MAV) developed by TopRS and it is constructed of fiberglass. ZC-3 MAV resembles a miniature version of Northrop X-4 Bantam without the inlets because it is powered by a two-blade propeller driven by a pusher engine mounted at the end of empennage. Specification:  ZC-5 is an UAV developed by TopRS in twin-boom layout with inverted v-tail. Propulsion is provided by a two-blade propeller driven by a pusher engine mounted at the rear end of the fuselage. ZC-5 is constructed of carbon fiber and is intended for long endurance surveillance. Specification:  ZC-7 is an UAV developed by TopRS in twin-boom layout with a pair of skids as landing gear. Propulsion is provided by a two-blade propeller driven by a pusher engine mounted at the rear end of the fuselage. ZC-7 is constructed of fiberglass, and has been deployed in Kunming for aerial survey missions to select the site for wind farm.