“The Terrestrial Laser Scanning Revolution in Forest Ecology” — Interface Focus Theme Issue
- It’s here! Just short of one year later, the theme issue of Interface Focus with papers from the Royal Society Theo Murphy meeting was released on February 16th. With an introduction, two review papers, and nine research papers, the issue presents both overviews and exciting new research in ecological applications of TLS. Kudos to Mark Danson and colleagues Rachel Gaulton, Mat Disney, and Crystal Schaaf for organizing the meeting and to Mark for coordinating the theme issue.
RCN Harvard Forest Calibration Activity
- In a two-week field campaign in late August, 2017, participants in the TLS Research Coordination Network gathered at Harvard Forest, in Petersham, Massachusetts, USA, to scan three plots with six instruments to measure canopy and tree structure. Joined by research foresters from Michigan State, University of Maine, and Virginia Tech, five individual trees of each of four species in the plots were destructively sampled for detailed structure measurements of weight and volume of wood and leaves by trunk and branch order. Stay tuned for lots of exciting results! For more information, see talks by Strahler and Radtke in the SilviLaser2017 Proceedings (links below).
New Posts on TLSIIG Member Sites and Blogs
Click on the links at the left to view the news at the sites below:
- Mat Disney’s Blogspot: Okay, why is Dame Judy Dench featured on Mat’s Blogspot? Turns out, she’s a tree lover and interested in English oaks from ecological and historical viewpoints. Who knew? Mat and his team recently scanned Dame Judy’s favorite oak, an old, open-grown tree in her garden. Visit the blogspot to see the the BBC trailer for a program on Dame Judy’s trees and enjoy the spectacular fly-throughs made from Mat’s data. Even shows some cylinders from QSM!
SilviLaser 2017, Virginia Tech, Blacksburg, Virginia, October 10-12, 2017
- A great time was had by all amidst the fall foliage on the eastern edge of the Appalachians. TLS was well represented with talks by Atticus Stovall, Crystal Schaaf, Peter Boucher, Zhan Li, Mat Disney, Phil Radtke, Kim Calders, Jeff Atkins, Harm Bartholomeus, and Alan Strahler. View the program and abstracts in the SilviLaser2017 Proceedings here:
New Video on Species Classification with QSM
- Can quantitative measures of tree structures, taken from QSM reconstructions, classify trees by species? Well, yes! A new YouTube video animation, keyed to a paper soon to appear in Remote Sensing of Environment by the Tampere U. of Technology (TUT) Inverse Problems group, shows the features that do it and how well they separate birch, pine, and spruce. Watch and listen in HD and stereo.
Quantitative Structure Model (QSM) Papers Online Here
- Have you been meaning to catch up on your reading about QSM? Look no farther than our new page of QSM papers with links to pdfs!
TLS Research Coordination Network
- The TLSRCN web site opened in Fall 2015, to document RCN activities and allow participants to exchange information. Have a look, and if you are interested, see the last paragraph of the Welcome page to apply to join.
- Caves, salt marshes, mangroves, and eroding coastal slopes, not to mention temperate and tropical forests, are all targets for the Compact Biomass Lidar (CBL), as demonstrated in a new paper in Remote Sensing in Ecology and Conservation by Ian Paynter and Crystal Schaaf’s crew at UMass Boston. Have a read to see what this “little lidar that could” can do!
- Looking for a up-to-date review paper on TLS and ALS? Jan Eitel and friends’ new article in Remote Sensing of Environment focuses on multitemporal and multispectral applications using return intensities as well as point locations. The reference list is worth the trip alone!
- Tired of worrying about using those stock values for the proportion of woody area (α) in the PAI to estimate the LAI from hemiphotos? Take heart — Will Woodgate and friends have a new method for retrieving α from classified imagery or scanner data that works really well. Their new paper in Agricultural and Forest Meteorology provides the details.
- Lambertian leaves? Think again. A new paper by Sanna Kaasalainen and colleagues at QFo Finland uses their hyperspectral lidar to show that leaves do, in fact, have a strong specular component to lidar reflectance. And, the specularity is wavelength dependent — so spectral indexes or even spectral ratios are angle-dependent, too. Hmmm….