Extraction of non-forest trees for biomass assessment based on airborne and terrestrial LiDAR data

Authors:
Matthias Rentsch;Alfons Krismann;Peter Krzystek
Affiliations:
Munich University of Applied Sciences, Department of Geoinformatics, Munich, Germany;University of Hohenheim, Institute for Landscape- and Plant-Ecology, Stuttgart, Germany;Munich University of Applied Sciences, Department of Geoinformatics, Munich, Germany
Venue:
PIA'11 Proceedings of the 2011 ISPRS conference on Photogrammetric image analysis
Year:
2011

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Abstract

The main goal of the federal funded project 'LiDAR based biomass assessment' is the nationwide investigation of the biomass potential coming from wood cuttings of non-forest trees. In this context, first and last pulse airborne laserscanning (F+L) data serve as preferred database. First of all, mandatory field calibrations are performed for pre-defined grove types. For this purpose, selected reference groves are captured by full-waveform airborne laserscanning (FWF) and terrestrial laserscanning (TLS) data in different foliage conditions. The paper is reporting about two methods for the biomass assessment of non-forest trees. The first method covers the determination of volume-to-biomass conversion factors which relate the reference aboveground biomass (AGB) estimated from allometric functions with the laserscanning derived vegetation volume. The second method is focused on a 3D Normalized Cut segmentation adopted for non-forest trees and the follow-on biomass calculation based on segmentation-derived tree features.