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Proceedings Paper

Close-range environmental remote sensing with 3D hyperspectral technologies
Author(s): O. Nevalainen; E. Honkavaara; T. Hakala; Sanna Kaasalainen; N. Viljanen; T. Rosnell; E. Khoramshahi; R. Näsi
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Paper Abstract

Estimation of the essential climate variables (ECVs), such as photosynthetically active radiation (FAPAR) and the leaf area index (LAI), is largely based on satellite-based remote sensing and the subsequent inversion of radiative transfer (RT) models. In order to build models that accurately describe the radiative transfer within and below the canopy, detailed 3D structural (geometrical) and spectral (radiometrical) information of the canopy is needed. Close-range remote sensing, such as terrestrial remote sensing and UAV-based 3D spectral measurements, offers significant opportunity to improve the RT modelling and ECV estimation of forests. Finnish Geospatial Research Institute (FGI) has been developing active and passive high resolution 3D hyperspectral measurement technologies that provide reflectance, anisotropy and 3D structure information of forests (i.e. hyperspectral point clouds). Technologies include hyperspectral imaging from unmanned airborne vehicle (UAV), terrestrial hyperspectral lidar (HSL) and terrestrial hyperspectral stereoscopic imaging. A measurement campaign to demonstrate these technologies in ECV estimation with uncertainty propagation was carried out in the Wytham Woods, Oxford, UK, in June 2015. Our objective is to develop traceable processing procedures for generating hyperspectral point clouds with geometric and radiometric uncertainty propagation using hyperspectral aerial and terrestrial imaging and hyperspectral terrestrial laser scanning. The article and presentation will present the methodology, instrumentation and first results of our study.

Paper Details

Date Published: 18 October 2016
PDF: 10 pages
Proc. SPIE 10005, Earth Resources and Environmental Remote Sensing/GIS Applications VII, 1000503 (18 October 2016); doi: 10.1117/12.2240936
Show Author Affiliations
O. Nevalainen, Finnish Geospatial Research Institute (Finland)
E. Honkavaara, Finnish Geospatial Research Institute (Finland)
T. Hakala, Finnish Geospatial Research Institute (Finland)
Sanna Kaasalainen, Finnish Geospatial Research Institute (Finland)
N. Viljanen, Finnish Geospatial Research Institute (Finland)
T. Rosnell, Finnish Geospatial Research Institute (Finland)
E. Khoramshahi, Finnish Geospatial Research Institute (Finland)
R. Näsi, Finnish Geospatial Research Institute (Finland)

Published in SPIE Proceedings Vol. 10005:
Earth Resources and Environmental Remote Sensing/GIS Applications VII
Ulrich Michel; Karsten Schulz; Manfred Ehlers; Konstantinos G. Nikolakopoulos; Daniel Civco, Editor(s)

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