Total Stations and Accessories for Your Complete Surveying Needs. Schofield.–5th ed. 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. There are several types of modern surveying instruments, and some of them include: Electronic Distance Measurement (EDM) instruments. Modern surveying instruments provides faster and more precise surveying than conventional instruments. – 5th ed. Engineering surveying: theory and examination problems for students. Total stations. 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. p. cm. The following are some of the major advantages of using total station over the conventional surveying instruments: Field work is carried out very fast. ISBN 0 7506 4987 9 (pbk.) Its range varies from 2.8 km to 4.2 km. 1 Surveying I Title. Automatic levels. 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. 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. The accuracy of measurement varies from 5 mm to 10 mm per km measurement. Global Positioning System (GPS) devices. Electronic distance measuring (EDM) instrument is a major part of total station. For details of this method of survey, reader has to refer specialised books on ‘surveying and levelling’. Their types and uses are discussed in this article.
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