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Peter Terrett

4D Global

GNSS Specialist



Peter Terrett is an experienced business owner in the geospatial technology industry with over 30 years of expertise. Previously a Geodetic and Topographic surveyor for the state government, Peter became interested in GPS technology and started his own business in 1991, providing hardware, software, consultancy, and training in GPS for land base professionals.

His business gained recognition for its mapping expertise, expanding to include software development for the Australian and American markets. Peter's company has won several prestigious awards, including the Robert Hoddle Award, an AiiA iAward, and 15 Spatial Excellence Awards. 

Peter has a Master's Degree from Swinburne University and completed the VCAP program at Berkeley University. He shares his knowledge and expertise by writing articles, presenting at conferences, and providing free educational emails. 

Outside of work, Peter enjoys travelling, skiing, cooking and spending time with his family.


Recent Innovations have made mapping trees easy, highly productive and accurate


Global Navigation Satellite Systems (GNSS) have witnessed exponential growth in adoption across various industries, transforming the way infrastructure and environment experts operate in the field.  Recent advancements have elevated GNSS into a valuable tool for non-survey staff, enabling them to collect accurate field data while inspecting and maintaining trees.

This paper focuses on the application of GNSS for achieving sub-meter accuracy through modern GNSS receivers integrated with smartphones, iPads, or Android tablets, alongside suitable software. The technology's ability to map tree assets accurately and input associated attributes into databases has revolutionized the lifecycle management of this most valuable asset.

One of the significant breakthroughs with recent advances in innovation, is the utilization of GNSS by professional arborists who are not surveyors. The presentation delves into the crucial aspects of this technology, emphasizing recent developments in GNSS infrastructure and services. Key topics covered include hardware and its ease of use, the significance of all four Global GNSS constellations, SWaP considerations (Size, Weight, and Power), and the relevance of regional Satellite-Based Augmentation System (SBAS) such as SouthPAN, which provides free sub-meter corrections without mobile wireless data in Australia and New Zealand.

Moreover, the paper explores the benefits of Geoscience CORSNet, offering free access to numerous base stations through mobile wireless data. It also highlights the importance of understanding datums and cost considerations when implementing GNSS solutions.

The implementation of GNSS technology has significantly boosted efficiency and effectiveness for field users and data managers, leading to improved asset management, increased operational efficiency, enhanced strategic planning through better information, and elevated safety for both people and property.

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