Since the Second World War the use of electronics has become essential in many forms of surveying. Equipment grows more and more sophisticated, and although there are users’ manuals and scientific texts available which cover the basic theory, this is the first book which explains the workings of such equipment already and easily to the average user. Suddenly the "magic boxes" are made comprehensible. Calling upon a decade of experience, the authors have also described the practical use of equipment in the field, and have included in their chapters many hints and "tricks of the trade: which made be invaluable to the new surveyor.