A Comparative Analysis of Phytovolume Estimation Methods Based on UAV-Photogrammetry and Multispectral Imagery in a Mediterranean Forest
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Carvajal Ramírez, Fernando; Agüera Vega, Francisco; Martínez Carricondo, Patricio Jesús; Pereira Ramalho Serrano, Joao ManuelDate
2019Abstract
Management and control operations are crucial for preventing forest fires, especially in
Mediterranean forest areas with dry climatic periods. One of them is prescribed fires, in which
the biomass fuel present in the controlled plot area must be accurately estimated. The most used
methods for estimating biomass are time-consuming and demand too much manpower. Unmanned
aerial vehicles (UAVs) carrying multispectral sensors can be used to carry out accurate indirect
measurements of terrain and vegetation morphology and their radiometric characteristics. Based
on the UAV-photogrammetric project products, four estimators of phytovolume were compared
in a Mediterranean forest area, all obtained using the di erence between a digital surface model
(DSM) and a digital terrain model (DTM). The DSM was derived from a UAV-photogrammetric
project based on the structure from a motion algorithm. Four di erent methods for obtaining a DTM
were used based on an unclassified dense point cloud p...
Palabra/s clave
phytovolume
UAV
multispectral imagery