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Estimation of stem attributes using a combination of terrestrial and airborne laser scanning

Lindberg, Eva and Holmgren, Johan and Olofsson, Kenneth and Olsson, Håkan (2012). Estimation of stem attributes using a combination of terrestrial and airborne laser scanning. European Journal of Forest Research. 131:6, 1917-1931
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Official URL: http://dx.doi.org/10.1007/s10342-012-0642-5

Abstract

Properties of individual trees can be estimated from airborne laser scanning (ALS) data provided that the scanning is dense enough and the positions of field-measured trees are available as training data. However, such detailed manual field measurements are laborious. This paper presents new methods to use terrestrial laser scanning (TLS) for automatic measurements of tree stems and to further link these ground measurements to ALS data analyzed at the single tree level. The methods have been validated in six 80 × 80 m field plots in spruce-dominated forest (lat. 58°N, long. 13°E). In a first step, individual tree stems were automatically detected from TLS data. The root mean square error (RMSE) for DBH was 38.0 mm (13.1 %), and the bias was 1.6 mm (0.5 %). In a second step, trees detected from the TLS data were automatically co-registered and linked with the corresponding trees detected from the ALS data. In a third step, tree level regression models were created for stem attributes derived from the TLS data using independent variables derived from trees detected from the ALS data. Leave-one-out cross-validation for one field plot at a time provided an RMSE for tree level ALS estimates trained with TLS data of 46.0 mm (15.4 %) for DBH, 9.4 dm (3.7 %) for tree height, and 197.4 dm3 (34.0 %) for stem volume, which was nearly as accurate as when data from manual field inventory were used for training.

Authors/Creators:Lindberg, Eva and Holmgren, Johan and Olofsson, Kenneth and Olsson, Håkan
Title:Estimation of stem attributes using a combination of terrestrial and airborne laser scanning
Series/Journal:European Journal of Forest Research (1612-4677)
Year of publishing :2012
Volume:131
Number:6
Page range:1917-1931
Publisher:Springer-Verlag
ISSN:1612-4677
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Accepted version
Full Text Status:Public
Agris subject categories.:K Forestry > K10 Forestry production
U Auxiliary disciplines > U40 Surveying methods
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
Keywords:Airborne Laser Scanning, Terrestrial laser scanning, forest inventory, single tree detection
URN:NBN:urn:nbn:se:slu:epsilon-e-757
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-757
Additional ID:
Type of IDID
DOI10.1007/s10342-012-0642-5
ID Code:9280
Department:(S) > Dept. of Forest Resource Management
(NL, NJ) > Dept. of Forest Resource Management
External funders:FORMAS
Deposited By: Skogsbiblioteket Umeå
Deposited On:06 Dec 2012 14:20
Metadata Last Modified:02 Dec 2014 10:53

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