ISBN 0 7506 4987 9 (pbk.) Total Stations and Accessories for Your Complete Surveying Needs. 1 Surveying I Title. – 5th ed. 12.1.4 Linear Measurement with Electromagnetic Distance Measurement Instruments Nowadays for measuring distances electronic equipments called electromagnetic distance measurement (EDM) instruments have come in the market. The accuracy of measurement varies from 5 mm to 10 mm per km measurement. Total stations. p. cm. Electronic distance measuring (EDM) instrument is a major part of total station. Global Positioning System (GPS) devices. Their types and uses are discussed in this article. Instead of manually reading angles with a theodolite and physically entering data into a calculator, the computer inside a total station purchased on eBay automatically reads angles and performs trigonometry. Modern surveying instruments provides faster and more precise surveying than conventional instruments. The following are some of the major advantages of using total station over the conventional surveying instruments: Field work is carried out very fast. If you need a place where you can find a broad selection of surveyor equipment, be sure to look at what we have at Engineering Supply. Engineering surveying: theory and examination problems for students. There are several types of modern surveying instruments, and some of them include: Electronic Distance Measurement (EDM) instruments. For details of this method of survey, reader has to refer specialised books on ‘surveying and levelling’. 1 Surveying I Title 526.9′024624 Library of Congress Cataloguing in Publication Data Schofield, W. (Wilfred) Engineering surveying: theory and examination problems for students/W. Its range varies from 2.8 km to 4.2 km. Schofield.–5th ed. Automatic levels.
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