SEAM & The Surat Basin

Seam Spatial | Mavis Downs Mine


Automated monitoring of assets is a game-changer in the resources and energy sectors. Compared to conventional manual surveying techniques, automated GNSS monitoring can save substantial costs and reduce processing delays – while providing much more timely data.

Commercialising five million cubic feet of gas reserves, a high-profile project at the Surat Basin needed the right expertise and technology partner to develop their Geodetic Ground Movement Monitoring Points (GGMMPs).


As per the Environment and Biodiversity Protection Act 1999 (EPBC Act), the company was required to fulfil subsidence monitoring commitments through its Monitoring and Management Plan.

Each of the six monitoring points consisted of a 1-inch galvanised rod, inserted into the ground to a depth of up to 75 metres.

While their initial project scope with SEAM Spatial was to measure these rods quarterly through a static survey campaign, this would have posed several problems – alongside questions over effective control:

Wide dispersal of monitoring points – over a 100 km range

Significant cost and personnel investment needed for static measurements

Access concerns during adverse weather – such as long periods of rain

Infrequent provision of data and long processing turnaround


SEAM developed, configured and rolled out a custom GNSS solution that utilised both the already-installed monuments from Aecom’s Ground Engineering and Tunnelling team alongside Leica’s smart CrossCheck service.

The setup provides vertical ground movement data, with results every 24 hours – as opposed to the initial three-month cadence of the client’s original proposal. It includes:

Leica AR10 GNSS antenna at each GGMMP

GR30 receiver and 4G/NB-IoT communications

Solar power solution with LiFeP04 battery

Full lightning protection, Earth stakes and pits

“We were able to eliminate many of the issues that would have cropped up with a conventional static solution. These installations can operate autonomously and save a huge amount of resources for the client.”
– Jason Spall, Monitoring and Technology Expert at SEAM Spatial


For one of the largest gas developments on Australia’s east coast, with hundreds of coal seam gas wells, it was crucial for the company to comply with the EPBC Act as efficiently as possible.

Thanks to SEAM’s automated monitoring solution, the GGMMPs at the Surat Basin are significantly more than just measurement devices. They’re able to:

Collect and push RINEX data to Leica’s CrossCheck servers every single day.

Process the data and make it available via online portal or email within minutes.

Provide custom graphs and reporting for all computational requirements.

SEAM continues to provide ongoing remote support and has commissioned five new coal seam sites for the company – alongside extensions for two of the existing installations.


For automated GNSS monitoring across wide areas and critical projects, SEAM Spatial has the smart solutions.