Pioneering 3-D Forest Monitoring Research
HDR Spotlight: Tim Devereux
TLS point cloud coloured by height from Samford, Queensland.
Timothy Devereux, a PhD student at UQ, is at the forefront of developing and validating methods for precise 3D reconstruction of forest ecosystems using terrestrial laser scanning (TLS). His work involves creating high-fidelity digital representations of forests, enhancing accuracy and precision of canopy structure measurements across a diverse range of Australian ecosystems. Central to his research are his new scalable algorithms for reconstructing trees and forests from TLS point cloud data and analysing how different scanning approaches impact key measurements used to monitor and manage these environments.
Tim’s passion for this interdisciplinary field was ignited by the intersection of his computer science and environmental science backgrounds. He was captivated by how advanced computing could transform our understanding of forest ecosystems. During his Honours research, he pioneered using NASA’s GEDI laser scanner data across Queensland and discovered the potential of LiDAR technologies to revolutionise forest structure measurement, mapping and monitoring. "The opportunity to bridge satellite observations with ground measurements—creating that crucial scaling link—continues to drive my research," Tim explains.
Tim reconstructs 3D forest structures, e.g. exact replicas of trees, from TLS point clouds using custom algorithms in C++ and Python. His methods incorporate point cloud registration, noise filtering, voxelization, and tree segmentation techniques optimised for complex forest environments. He has developed computational pipelines that efficiently process high-density datasets through parallel computing, enabling the extraction of precise structural metrics from plot to landscape scales.
One of the major challenges Tim faces is creating algorithms that accurately process massive point cloud datasets without losing critical structural information. Balancing computational efficiency with precision is a constant struggle. Additionally, field campaigns in remote Australian locations present logistical challenges, particularly when coordinating multi-site data collection across diverse ecosystems. "Fieldwork in remote areas can be tough, but it's incredibly rewarding to see the direct impact of our research on forest management," Tim notes.
Tim's research bridges critical gaps between field measurements and satellite observations, enabling more accurate monitoring of forest ecosystems at scale. His digital forest approach provides a framework for validating and improving earth observation products, which is essential for understanding forest responses to climate change and disturbances.
Looking ahead, Tim plans to incorporate multi-platform approaches—from ground sensors to drone and satellite systems—to enable more accurate scaling of measurements across landscapes. He aims to develop open-source workflows that make these advanced technologies more accessible to forest managers and the wider community.
Tim collaborates with leading researchers and institutions globally, with his primary partnership being with CSIRO. Research visits to University College London and Ghent University have strengthened his international connections. Through SilvaCarbon, he has worked with forestry experts in Nepal and organisations such as NASA.
This journey has transformed Tim from a student into an independent researcher. His technical skills have expanded significantly, from programming to field expertise. Most importantly, he has developed strong communication abilities across diverse audiences—from explaining complex concepts to scientists at conferences to training forestry personnel in Nepal. The interdisciplinary nature of his work has taught him to bridge knowledge gaps between different fields and value diverse perspectives.
For students pursuing similar research paths, Tim advises developing a strong technical foundation while keeping sight of broader ecological questions. Embrace interdisciplinary work—innovation often emerges at the intersection of fields. Build diverse skills encompassing both field expertise and computational abilities. Finding mentors who challenge and support your growth is crucial in developing as a researcher. Finally, invest in communicating your research clearly to diverse audiences, as your work's impact depends on how effectively you share it with others.
Outside of research, Tim enjoys bushwalking in Australia's national parks and tinkering with electronics projects that combine his IT background with environmental monitoring interests.
Left to right: TLS at Fletcher View, Queensland - collecting top of canopy leaves from Robson Creek, Queensland - understory spectra collection at Tumbarumba, New South Wales.
