OSU research project aims to improve forest inventory data collection by developing operational system; goal is to develop two software programs to fuse point clouds from above and below the canopy and another to compile forest inventory from point clouds

Sample article from our Forestry & Timberland

November 16, 2023 (press release) –

Having a reliable way to monitor and analyze forest inventory is a key part of managing forests and forecasting forest dynamics. Remote sensing techniques offer a way to do this vital work, as they allow forest managers to consistently collect a large amount of relevant data and information across vast landscapes. This data provides valuable insights into the status and trends of forests, which supports informed decision-making related to forest management.

The most common remote sensing method used to collect data about tree dimensions and defects, has been laser scanning, or lidar (light detection and ranging). Lidar has traditionally been used to observe the forest from above the canopy and take vertical measurements of tree dimensions, but it is less reliable for producing horizontal measurements. Lidar is often supplemented by field measurements, which provide on-the-ground observations to round out the data.

In the last decade, with improvements in laser technology and decreased use costs, it’s now possible to scan the forest from below the canopy, usually using handheld mobile lidar systems. While this technology collects robust data from below the canopy, it does not provide information about the tops of the trees, as the above-the-canopy lidar system does.

This means that to compile a comprehensive forest inventory, multiple datasets are needed. However, it can be challenging to combine datasets because georeferencing technology that efficiently merges datasets is lacking.

This research project, led by Oregon State University Associate Professor Bogdan Strimbu, aims to improve forest inventory data collection by developing an operational system to integrate the data, or point clouds, and provide a more complete inventory of forests.

The goal is to develop two software programs, one that will fuse point clouds from above and below the canopy – and another, which will compile a comprehensive forest inventory from point clouds.

The researchers hope that this project will improve forest monitoring and analysis and hep inform decision makers. Comprehensive 3-D datasets can provide information about threats to trees including fire, insect, diseases, and competition. A near complete picture of the forest ecosystem will help researchers and forest managers better understand the effects of climate change, the state of wildlife habitat, and the status of carbon storage in forests. Quickly produced and reliable data can help decision-makers implement more sustainable forest management practices.

Oregon State University is working in conjunction with the Elliott State Research Forest, the Oregon Department of Forestry, the Siuslaw National Forest, and private landowners.

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