NDLI: Implications of interpreting tropical dry forest succession after radiometric correction of Chris/ Proba images

Content Provider	IEEE Xplore Digital Library
Author	Garcia-Millan, V.E. Sanchez-Azofeifa, G.A. Malvarez, G.C. More, G. Pons, X. Yamanaka, M.
Copyright Year	2012
Description	Author affiliation: Area of Physical Geography, Univ. Pablo de Olavide, Ctra. Utrera, kml, Sevilla, Spain (Garcia-Millan, V.E.; Malvarez, G.C.) \|\| Centre for Earth Observation Sciences and Department of Earth & Atmospheric Sciences. University of Alberta, Canada (Sanchez-Azofeifa, G.A.; Yamanaka, M.) \|\| Geography Department, B-Building Univ.Autònoma de Barcelona, Cerdanyola del Vallè, Spain (More, G.; Pons, X.)
Abstract	In the present paper, we evaluate the effect of cast shadows in the classification of three successional stages of tropical forest in Mexico using hyperspectral and multiangular Chris/Proba images. A simple algorithm based on the cosine of the angle of solar incidence on the terrain is applied to correct the effect of topography on Chris/Proba's reflectances. Previous to the correction of topographic effects, Chris/Proba images were atmospherically corrected in BEAM software. Vegetation maps of the study site were generated using non-parametric decision trees, defining four mam classes: late, intermediate and early stages of succession within a tropical dry forest, and riparian forests. By the comparison of resultant vegetation maps before and after the correction of topography in Chris/Proba's spectral data, we found that late stage of succession and riparian forests are overestimated in non-corrected images while intermediate and early stages of succession are underestimated. Errors in classification are more important in extreme Chris/Proba's angles of observation. Thus, the radiometric correction of topography is necessary for an accurate classification of succession in tropical dry forests.
Starting Page	6232
Ending Page	6235
File Size	160854
Page Count	4
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6352682
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems tropical dry forest Multiangular radiometry spectrometer succession
Content Type	Text
Resource Type	Article

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