18 October 2016 Tropical forest heterogeneity from TanDEM-X InSAR and lidar observations in Indonesia
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Fires exacerbated during El Niño Southern Oscillation are a serious threat in Indonesia leading to the destruction and degradation of tropical forests and emissions of CO2 in the atmosphere. Forest structural changes which occurred due to the 1997-1998 El Niño Southern Oscillation in the Sungai Wain Protection Forest (East Kalimantan, Indonesia), a previously intact forest reserve have led to the development of a range of landcover from secondary forest to areas dominated by grassland. These structural differences can be appreciated over large areas by remote sensing instruments such as TanDEM-X and LiDAR that provide information that are sensitive to vegetation vertical and horizontal structure. One-point statistics of TanDEM-X coherence (mean and CV) and LiDAR CHM (mean, CV) and derived metrics such as vegetation volume and canopy cover were tested for the discrimination between 4 landcover classes. Jeffries-Matusita (JM) separability was high between forest classes (primary or secondary forest) and non-forest (grassland) while, primary and secondary forest were not separable. The study tests the potential and the importance of potential of TanDEM-X coherence and LiDAR observations to characterize structural heterogeneity based on one-point statistics in tropical forest but requires improved characterization using two-point statistical measures.
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Elsa Carla De Grandi, Elsa Carla De Grandi, Edward Mitchard, Edward Mitchard, "Tropical forest heterogeneity from TanDEM-X InSAR and lidar observations in Indonesia", Proc. SPIE 10003, SAR Image Analysis, Modeling, and Techniques XVI, 1000305 (18 October 2016); doi: 10.1117/12.2241796; https://doi.org/10.1117/12.2241796

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