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Instrument calibration

This page provides information and tools required to calibrate Electronic Distance Measurement Instrumentation (EDMI), digital levelling staves and Global Navigation Satellite System (GNSS) receivers.


The EDMI calibration software called ‘Baseline’ enables users to calibrate their instruments using one of three available EDM baselines. An updated version of the software is released every two years after the re-measurement (re-calibration) of the baselines. The last re-calibration of EDM baselines was completed in July 2023.

The current distribution version 2023.07.27 contains EDM baselines named Curtin 2023, Kalgoorlie 2023 and Busselton 2023 in application Version These replace the Curtin 2021, Kalgoorlie 2021 and Busselton 2021 baselines in Version that should no longer be used for EDMI calibration.

The Baseline software runs on Windows OS (32 and 64bit). If you have issues running the software after install, try re-installing in a new directory.

EDM baselines

Regular calibration of EDMI is required under Regulation 20 of the Licensed Surveyors (General Surveying Practice) Regulations 1961. Instrument calibration ensures the distances measured are legally traceable back to the national and international standard.

To enable EDMI calibration, Landgate provides three EDM baselines and software. An EDM baseline consists of several stable concrete pillars which have been accurately surveyed (and certified) to determine distances. The EDM baseline is surveyed at regular intervals or as required. Landgate is a NATA accredited organisation as a verifying authority of length on EDM baselines. Landgate surveys and issues a Regulation 13 (of the National Measurement Regulations 1999 (Cth)) certificate on the three Baselines every two years (or as required).

EDM baseline locations:

Booking sheets:

Temporary Closure Notice: Curtin University EDM Baseline is closed for maintenance.

Landgate has been working with engineering consultants to stabilise the foundations of the Curtin Baseline pillars by injecting microfine concrete grout around them. We are happy to inform you that the field work is now done, but we are not finished yet. We need to wait for the concrete to settle, then recalibrate the baseline, compute new parameters and update the Baseline software. Therefore, we expect the baseline to be available at the end of March.

Both the Kalgoorlie and Busselton Baselines are open for EDMI calibrations.

Digital level barcoded staff calibration

Landgate provides a barcode staff calibration range facility located on the Land Surveyors Licensing Board's examination site at Boya (Darlington) which consists of two observing pillars and a series of 21 stainless steel pins set in a solid granite outcrop. The range is regularly monitored to ensure its accuracy and stability.

Landgate offers this self-service online staff calibration data processing service:

Note: the portal may take up to 30 seconds to load. This new service replaces the previous downloadable user processing “Staff” software application.

GNSS testing facility

Landgate provides a Global Navigation Satellite Systems (GNSS) testing facility located at Curtin University. The GNSS testing facility consists of 5 pillars that are regularly monitored (horizontally and vertically) to ensure highest accuracy and stability.

Landgate also provides this GNSS test network guideline to encourage a uniform approach to testing GNSS equipment.

The GNSS testing facility is available at Curtin University, Kent Street, Bentley, 24 hours, 7 days a week