Surveyor General-Victoria (SGV) is committed to continuing to serve our customers during the evolving coronavirus (COVID-19) situation. As a result of current restrictions, there are changes to the standard EDM calibration procedures and facilities. Please refer to the EDM calibration baseline section for further information.

Regulation 6(1)(a) and (b) of the Surveying (Cadastral Surveys) Regulations 2015 requires a licensed surveyor to use survey equipment that has been compared to a standard of measurement. The process and basis of comparison must be adequate to obtain the accuracy required under the regulations.

Regulation 6(2) requires licensed surveyors to retain records of comparisons and make them available for inspection upon request by the Surveyor-General.

Comparison of EDM equipment

Surveyor-General of Victoria Practice Directives require Electronic Distance Measurement (EDM) equipment used on any survey to be calibrated:

  • at intervals not exceeding 12 calendar months
  • after every repair to all or part of such equipment
  • by comparison to a baseline approved by the Surveyor-General.

To assist licensed surveyors to calibrate EDM equipment, the Surveyor-General Victoria maintains an EDM calibration handbook, EDM calibration software, and six EDM calibration baselines in Victoria.

EDM calibration handbook

Meteorological transfer standard corrections

The Surveyor-General Victoria maintains a 'transfer standard' temperature and pressure gauge. The transfer standard is calibrated against the national standards for temperature and pressure on a biennial basis. During the annual baseline calibration surveys, each of the 'baseline standard' thermometer and barometer devices is compared against the transfer standard. These comparisons are undertaken to monitor and record the offset of the baseline standard thermometer and barometer.

In order to ensure that readings from meteorological equipment used in instrument calibration are comparable to the national standards for temperature and pressure, the recorded offset for the baseline standard to transfer standard must be applied as a correction. These corrections are listed in the table below, and must be included on the instrument calibration booking sheet.

Baseline
TemperaturePressure
Bendigo 0.0 +2.1
Braeside 0.0 +1.4
Cowwarr +0.1 +1.5
Geelong +0.1 +2.5
Hamilton +0.1 +2.7
Mitcham -0.1 +2.1

Table last updated 12/12/2019

Pulsed Instruments and instruments with a unit length of zero

For instruments with a unit length of zero and pulsed instruments, the meteorological observations must be entered into the instrument at the time of the calibration.

The unit length, frequency and carrier wavelength are used in the calculation of the meteorological corrections and cyclic errors within the Baseline software. Surveyors can enter the instrument into the register, leave all the details blank and the software will still process the data correctly.

Instrument parameter spreadsheets

The following spreadsheets list instrument specific parameters to assist surveyors when using the Baseline software to calibrate EDM equipment.

EDM Instrument Parameters (Excel, 112.0 KB)
Leica Instrument Parameters (PDF, 220.7 KB)
Topcon Instrument Parameters (Excel, 35.5 KB)
Trimble Instrument Parameters (Excel, 30.0 KB)

EDM calibration software

To assist surveyors to calibrate EDM equipment against standard baselines, an EDM calibration computer program  called Baseline (Version 6.0.0.5, July 2012) has been made available for public use by the Western Australia's land information authority, Landgate. The Surveyor-General Victoria has adopted this software for calibrating EDM baselines and EDM equipment in Victoria.

The latest version of Baseline and distribution file for calibrating EDM equipment against Victoria's baselines is available from the following link:

Distribution_12122019 (ZIP, 3.4 MB)

The distribution file available from this link is updated annually following the re-verification of Victoria's baselines. The EDM Calibration Handbook and online help provide the user with the necessary instructions to run Baseline.

The new version of Baseline has been prepared to overcome difficulties running on 64-bit versions of Windows 7. If users experience persistent runtime difficulties running Baseline on Windows 7, please contact geodetic survey via smes.support@delwp.vic.gov.au.

Users who have obtained Baseline directly from Landgate must ensure they have the most up to date Victorian baseline information before reducing their results.

EDM calibration baselines

The Surveyor-General of Victoria maintains six EDM calibration baselines in Victoria: Bendigo, Braeside, Geelong, Hamilton, Cowwarr and Mitcham. As a verifying authority for length, the Surveyor-General of Victoria arranges for the re-verification of these baselines on an annual basis in accordance with the provisions of the National Measurement Act 1960 and National Measurement Regulations 1999.

Please note: there are changes to our facilities’ operating hours in response to the current restrictions. Refer to controlling office locations below for up to date operating hours or closures.

Victoria's EDM calibration baselines and controlling offices

The baseline is available for booking (via the EDM Booking Page) and use even though the controlling office is closed (only open Wednesdays 9am-12 noon). You will need to organise any required worker permits and COVIDSafe Plans & practices (e.g. hand sanitiser, disinfectant wipes, masks, social distancing etc.).

Please note:

  • All ancillary equipment is kept in a large ‘umbrella box’ near "Pillar 2".
  • The combination for electric gate and umbrella box lock will be sent to you in a separate email once a booking is confirmed.                                                                                  
  • Please remember to lock the box and return all the equipment inside.
  • Please bring cleaning supplies and wipe down the ancillary equipment before and after use (umbrellas, pillar cap key etc).

We appreciate your assistance in the ongoing operation of the Bendigo EDM instrument calibration facilities.

McDowells Road adjacent to Bendigo Airport Bendigo

Bendigo (PDF, 36.9 KB)

EDM Baseline Bookings

Department of Environment, Land, Water & Planning

Survey Section 7 Taylor Street Bendigo 3551

(03) 5430 4444

Calibration baseline is closed due to current restrictions. We will provide an update on bookings when current restrictions are lifted. SGV will apply an extension to any equipment that exceeds the 12-month recalibration requirement during this period.

Please note:

  • A key safe has been installed on the equipment cabinet near the Parks Victoria Rangers Office.
  • The key safe code will be sent to you in a separate email once a booking is confirmed.
  • Please remember to lock the cabinet and return keys to safe.
  • Please bring cleaning supplies and wipe down the ancillary equipment before and after use (umbrellas, pillar cap key).
  • Braeside Park is seeing increased use. Please be considerate of the general public and abide by the vehicle speed limit (20km/h)
  • The baseline is open from 7.30am until 3.30pm. Parks Victoria close the access road gate at 3.30pm so please don’t get locked in.
  • The toilets and facilities at Braeside Park have been closed.

We appreciate your assistance in the ongoing operation of the Braeside EDM instrument calibration facilities

Braeside Park Lower Dandenong Road Braeside
Melway 88 D10

Braeside Park Ranger's Office (03) 9265 7300

Braeside (PDF, 22.1 KB)

EDM Baseline Bookings

Department of Environment, Land, Water & Planning
Land Use Victoria Calibration Officer
GPO Box 527
Melbourne 3001

The controlling office is closed until further notice however, the baseline is available for booking (via the EDM Booking Page) and use. You will need to organise any required worker permits and COVIDSafe Plans & practices (e.g. hand sanitiser, disinfectant wipes, masks, social distancing etc.).

Please note:

  • All ancillary equipment is kept in a large metal 'umbrella box', installed up McGilvray Place at the back of St. Quentin Consulting. Press on the black key lock on wooden gate to open.
  • The combination lock code will be sent to you in a separate email once a booking is confirmed.
  • Please remember to lock the box and return all the equipment.
  • Please bring cleaning supplies and wipe down the ancillary equipment before and after use (umbrellas, pillar cap key)
  • Please use flagging to mark any tree along the baseline that you think is restricting line of site sight for the arborist.

Bellarine Rail Trail Boundary Road Newcomb
Melway 452 H10

Geelong Baseline (PDF, 25.2 KB)

EDM Baseline Bookings

St Quentin Consulting Pty Ltd
51 Little Fyans Street
South Geelong 3220

(03) 5229 2011

Baseline available, but please call the office a day in advance to confirm availability. You will need to organise any required worker permits and COVIDSafe Plans & practices (e.g. hand sanitiser, disinfectant wipes, masks, social distancing etc.).

Balkans Road 2 km west of Fairburn Road

Hamilton (PDF, 15.8 KB)

EDM Baseline Bookings

Brayley & Hayes P/L
85 Kennedy Street
Hamilton 3300

(03) 5571 9171

The controlling office is closed until further notice however, the baseline is available for booking (via the EDM Baseline Booking Page) and use. You will need to organise any required worker permits and COVIDSafe Plans & practices (e.g. hand sanitiser, disinfectant wipes, masks, social distancing etc.).

Please note:

  • All ancillary equipment is kept in a  large metal 'umbrella box', installed near Pillar 1.
  • The combination lock code will be sent to you in a separate email once a booking is confirmed.
  • Please remember to lock the box and return all the equipment.
  • Please bring cleaning supplies and wipe down the ancillary equipment before and after use (umbrellas, pillar cap key)

We appreciate your assistance in the ongoing operation of the Cowwarr EDM instrument calibration facilities.

Foxs Road West Cowwarr

Cowwarr (PDF, 27.0 KB)

EDM Baseline Bookings

SMES Australia Pty Ltd (Traralgon)
Level 1/1 Franklin Street
Traralgon 3844

(03) 5173 0100

Office is closed until further notice. Please consider the Braeside EDM Baseline as an option for bookings outside of the restrictions period.

Menin Road, Mitcham Melway 48 F12 Nacha Moore Land Surveyors

Mitcham (PDF, 11.2 KB)

EDM Baseline Bookings

Nacha Moore Land Surveyors Pty Ltd
226 Mitcham Road
Mitcham 3032

(03) 9872 5512

Baseline bookings

  • Bookings are required in advance to use the baselines.
  • Refer to individual baseline details for opening hours or closures.
  • Baselines are available for use on weekdays only.
  • Users are required to have their own copies of official booking sheets.
  • No rubbish is to be left behind.
  • All gates must be left in their original position.
  • Pillar caps are to be refitted upon completion.
  • When using non-standard prisms, sighting difficulties may be experienced between pillars. The same type of prism must be used for the observations to achieve a valid calibration.
  • Please bring cleaning supplies and wipe down the ancillary equipment before and after use (umbrellas, pillar cap key)

For general enquiries: smes.support@delwp.vic.gov.au

Page last updated: 16/09/20