ABSTRACT
Forests cover 30% of continental surfaces and play a key role in climate change regulation, in raw material and renewable energy supply, and in biodiversity conservation. Successfully maintaining all the functions of forest ecosystems through their sustainable management is thus crucial for the future of mankind. However, developing appropriate policies and management practices requires an in-depth knowledge on forest ecosystems
Acronyms and Defin tions ................................................................................................................ 449 17.1 Introduction ............................................................................................................................ 449 17.2 Why Measure Tree Heights? ................................................................................................. 450
17.3 Two Promising Optical Remote-Sensing Techniques for Tree Height Measurements: LiDAR and Digital Photogrammetry ...................................................... 453 LiDAR • Ÿree-Dimensional Modeling of the Canopy by Digital Photogrammetry • Comparison of ALS and Photogrammetric Products
17.6 Conclusion and Perspectives .................................................................................................475 Acknowledgments ...............................................................................................................................476 References ............................................................................................................................................ 477
within a fast-evolving context, as well as appropriate models to forecast how the way they will respond to management practices and global change.
