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EDM CALIBRATION HANDBOOK Land Victoria Department of Sustainability and Environment Edition 11 December 2010 EDM Calibration Handbook Edition 11. Date: December 2010 EDM Calibration Handbook Edition 11. Date: December 2010 ..

    EDM CALIBRATION HANDBOOK

    Land Victoria

    Department of Sustainability and Environment

    Edition 11

    December 2010

EDM Calibration Handbook Edition 11. Date: December 2010

Geodetic Survey

    Office of Surveyor-General Victoria

    Land Victoria

    Department Of Sustainability and Environment

EDM Calibration Handbook

    Edition 11

    December 2010

ISBN 1 74106 023 0

Copyright The State of Victoria, Department of Sustainability and Environment, 2010.

Disclaimer

This publication may be of assistance to you but the State of Victoria and its employees do not

    guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular

    purposes and therefore disclaims all liability for any error, loss or other consequence which may arise

    from you relying on any information in this publication.

Handbook Errors and Discrepancies

Land Victoria would appreciate notification of any errors or discrepancies found in this handbook.

    Please direct any correspondence to:

Calibration Officer

    Office of Surveyor-General Victoria

    Land Victoria

    570 Bourke Street

    Melbourne Victoria 3000

Find more information go to www.dse.vic.gov.au/property

    EDM Calibration Handbook Edition 11. Date: December 2010

Preface

    In relation to measurement, the professional surveyor is intent not only on getting it right, but in proving that it is. To achieve this, surveyors rely on their measuring equipment which must be systematically tested for errors and compared to the national standard.

    John E Tulloch

    Surveyor-General of Victoria

    The Surveyor-General of Victoria sets standards for property surveys under the Surveying (Cadastral Surveys) Regulations 2005, including requirements for the calibration and standardisation of survey equipment. To assist licensed surveyors in meeting these standards, the Surveyor-General is responsible for issuing practical implementation advice and providing certified calibration facilities. The Surveyor-General of Victoria Practice Directives, January 2007 addresses the requirements

    regarding calibration of Electro-optical Distance Meter (EDM) instruments. It states that EDM instruments must be calibrated over a certified baseline at intervals not exceeding 12 months, or more frequently, if conditions warrant it. It also states that a Licensed Surveyors Report must detail calibration information about the EDM used in the survey including: make and model, serial number, EDM calibration site and date of calibration.

    This EDM calibration handbook provides the specification and practice direction for achieving EDM calibration at each of the six baselines across the state. The Surveyor-General is a Verifying Authority for length (up to 1160 metres) and is responsible for the annual re-certification of the baselines as subsidiary standards of length.

    The Surveyor-General, through the Geodetic Survey, provides the continued certification of the baselines and the periodic updates of the handbook, and acknowledgement is also made of the assistance of Land Victoria staff throughout the state.

    The Surveyor-General acknowledges the cooperation and support provided by Brayley & Hayes Pty. Ltd.; SMEC Urban Pty. Ltd. (Gippsland); and St. Quentin Consulting Pty. Ltd.; for their assistance with the Hamilton, Loy Yang and Geelong baselines, respectively.

John E Tulloch

    Surveyor-General of Victoria

    December 2010

    EDM Calibration Handbook Edition 11. Date: December 2010

Table of Contents

CHAPTER 1: INTRODUCTION .......................................................................................................... 1

    CHAPTER 2: LEGAL TRACEABILITY OF LENGTH MEASUREMENTS ........................................... 2 Survey Practice Directive - September 2006 ................................................................................... 3

    Surveying (Cadastral Surveys) Regulations 2005 ............................................................................ 3 Survey Co-ordination Regulations 2004 .......................................................................................... 4

    CHAPTER 3: THE THEORY OF EDM CALIBRATION ....................................................................... 5 Instrument Errors ............................................................................................................................ 5

    Baseline Design .............................................................................................................................. 6

    Pillars and Ground Marks ................................................................................................................ 6

    CHAPTER 4: RECOMMENDED OBSERVING PROCEDURES .......................................................... 8 General Procedures ........................................................................................................................ 8

    Measurement Sequence (Excluding the Bendigo and Geelong Baselines) ...................................... 9 Measurement Sequence Bendigo and Geelong Baselines Only .................................................. 10 Loy Yang Baseline.. ……………………………………………………………………………………...

    10

LOCATION OF BASELINES ............................................................................. 错误;未定义书签。11

Unit Lengths of EDM ....................................................................................................................... 19

    CHAPTER 5: REDUCTION AND INTERPRETATION ...................................................................... 23 REFERENCES ................................................................................................................................. 24

    APPENDIX A SAMPLE BOOKING SHEETS ................................................................................. 25

EDM Calibration Handbook Edition 11. Date: December 2010

Chapter 1: Introduction

    1.1 This handbook deals with the calibration and standardisation of Electro-optical Distance

    Meters (EDM) in the State of Victoria.

    1.2 There are now six baselines in Victoria that are maintained as subsidiary standards of length

    and as such are suitable for the calibration and standardisation of EDM. The new Geelong

    baseline was created in 2008. The baselines are of Sprent/Zwart (Hobart) design with the

    exception of the Bendigo and Geelong baselines, which are a modified Schwendener design.

    1.3 Calibration of EDM is concerned with the determination of instrument errors, whereas

    standardisation refers to the comparison of the instrument to a standard of length traceable to

    the National Standard. Instruments must be calibrated within a prescribed level of precision in

    order to be standardised. Chapter 2 discusses the legal background of standardisation.

    1.4 The theory of EDM calibration is summarised in Chapter 3 along with an explanation of the

    instrument errors that are determined.

1.5 The observing procedures outlined in Chapter 4 are based on the Instructions on the

    Verification of Electro-optical Short-Range Distance Meters on Subsidiary Standards of Length

    in the Form of EDM Calibration Baselines proposed by Dr. J.M. Rueger (1984).

    1.6 EDM users who wish to per