MR. WILSON'S book is comprehensive, clear and well illustrated, and contains much information of practical use to the surveyor and explorer, which is not usually found in works on surveying and ...

Topographic survey is the determination of the location of objects on the surface of the earth. It may be done by aerial or ground method. The first requirement of topographic survey is a good control ...

The HydroBoat 1500 is a versatile unmanned surface vessel (USV) driven by four powerful thrusters and designed to carry out underwater topographic surveys of lakes, rivers, reservoirs and other bodies ...