Topographic mapping and processing of urban or rural plans, marine charts using laser rangefinder

摘要

The operator (5) measures horizontal and vertical angles and distances by aiming the laser beam from a tacheometric surveying instrument (1) at a target (7) held up by a prism carrier (4), who is equipped with a radio receiver (3) for supplying information to a graphics screen (6) with a light pen or similar input device and hard disc memory. The measurements are conveyed from the operator's radio transmitter (2) by a serial or parallel link with all necessary checks on transmission errors, corrected if necessary by retransmission. The receiver and screen are combined in a weatherproof box.