Mapping plant area index of tropical forest by Lidar: calibrating ALS with TLS

SilviLaser 2015, La Grande Motte, FRA, 28-/09/2015 - 30/09/2015International audienceHighlights: - We compare Plant Area Density (PAD) profiles derived from Terrestrial Laser Scanning (TLS) and contemporaneous Aerial Laser Scanning (ALS) in dense tropical forest- Poor sampling of the lower part of the canopy profile by ALS is mitigated by using a multiple resolution approach- Anisotropy of transmittance revealed by TLS allows further improvement of PAD estimates

Very high resolution satellite images for parameterization of tree-scale forest process-based model

International audienceVery high spatial resolution (VHSR) satellite images provide interesting information for parameterizing tree-scale forest process-based models, and in particular their light absorption submodels, which is at the basis of photosynthesis calculation. Such tree-scale models require a large amount of field measurements to describe the forest ecosystems, i.e. all tree positions, their sizes and shapes, their leaf areas, etc. These data are generally measured directly in the field, which can be tedious for large areas like a forest stand. In this study, we explore the possibility to parameterize such tree-scale models directly or indirectly from panchromatic and multispectral very high resolution images