Welcome!

What’s New:

  • Himalayan Cedars in the Mist: The new TLSIIG header image is thanks to Michael Schaefer and his recent blog post at the Oz DWEL Blogspot. According to the post, it is produced from a scan acquired at the Australian National Arboretum in Canberra with the Dual Wavelength Echidna Lidar and uses intensity information recorded from the 1556 nm laser. Pictured is a stand of Himalayan cedars — with intensities fading to white with distance, the trees seem to disappear into a misty world.

TLSIIG at AGU 2016, December 12-16, San Francisco

  • Five sessions, Wednesday through Friday, will feature nine papers and posters on TLS, including the session “Advancing understanding of ecosystem structure and function through remote sensing,” organized by RCN participants Chris Gough and Brady Hardiman. Find the abstracts through the links on our AGU 2016 page.

Royal Society TLS Meeting, 27-28 February 2017

  • The Royal Society of London has announced a two-day scientific meeting entitled The Terrestrial Laser Scanning Revolution in Forest Ecology, to be held at Chicheley Hall, near London, on February 27–28, 2017. Organized by TLSIIG members Mark Danson, Mat Disney, Rachel Gaulton, and Crystal Schaaf, the meeting will focus on how TLS technology is now revolutionizing the mapping and monitoring of change in forest ecosystem structure and function.  Click on the link for more info and to request an invitation.
  • Are you a PhD student or postdoc interested in attending? The MDPI journal Sensors is holding a competition for two annual travel awards you might win. Apply by December 31 for an award of up to 800 Swiss francs.

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!

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: FACE time! Free Air CO2 Enrichment, that is. Mat’s crew returned in September from the ZF2 forest site, north of Manaus, Brazil, after scanning 8 30-m rings of tropical forest maintained at 600 p-m CO2 to observe the effects of higher levels of CO2 on the forest ecosystem. See the site and images from the Riegl and the group’s new Zeb-Revo GeoSLAM scanner here.
  • Wageningen University and Research: Billy the Elephant is now joined by new updates to the WUR web site, showing recent scanning locations, including Ethiopia and Ghana. If you are interested, scan data and reference data are available. Also, don’t miss the youtube videos and animations and the links to their latest papers!

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.

New Publications

  • 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….
  • Can TLS actually distinguish between tree species? Apparently so, if you have the right classification features based on TSL structural measurements. Yi Lin and Martin Herold show how in their new paper in Agricultural and Forest Meterology.
  • Road trip! Attaching a SICK lidar and an active optical sensor to their 4-wheel drive SUV, Michael Schaefer and Dave Lamb recently cruised through a tall fescue pasture, mapping biomass from height and NDVI. You can read how they did it in their recent article in Remote Sensing.

Earlier News

Scan Movies and Fly-Throughs