%0 Book Section
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%3 INPE 10509.pdf
%X Under tropical conditions, highly weathered soil types dominated by clay minerals and iron and aluminium oxides present spectral reflection characteristics that are unique or distinct from those observed in soils of temperature areas. In this chater, a review of the factors that affect the reflection and colour of tropical soils is presented. Results from previous studies with six tropical soil profiles and from a chemical washing esperiment are used to demonstrate the influence of constituents such as organic matter, iron oxides, and clay fraction, in modifying soil reflectance. The use of hyperspectral remote sensing for mineral identification in tropical soils is addressed. An example of an approach to derive chemical maps from the use of AVIRIS (Airbone Visible/ Infrared Imaging Spectrometer)- derived empirical relationships betwwen pixel reflectance values and soil constituents is presented Finally, the influence of soil composition and the effects of band positioning and bandwidth on the quality of the soil lines, the conceptual base ofr most od the vegetation indices such as the normalized difference vegetation index (NDVI), are demonstrated.
%E Roy, P. S.,
%T Spectral behaviour of tropical soils and implications for the monitoring of vegetation Geoinformatics for tropical ecosystems
%@secondarytype PRE LI
%K AVIRIS, band positioning, bandwidth, hyperspectral remote sensing, NDVI, reflectance, soil line, tropical soils, vegetation indices.
%@nexthigherunit 8JMKD3MGPCW/3ER446E
%B Geoinformatics for tropical ecosystems
%@usergroup administrator
%@group DSR-INPE-MCT-BR
%C Dehra Dun
%@copyholder SID/SCD
%@secondarykey INPE-10509-PRE/5984
%2 sid.inpe.br/jeferson/2004/01.14.14.37.26
%I Asian Association of Remote Sensing
%P 375-403
%4 sid.inpe.br/jeferson/2004/01.14.14.37
%D 2003
%@documentstage not transferred
%O Working Group on Tropical Ecosystem Management
%A Galvão, Lênio Soares,
%A Vitorello, Icaro,
%@area SRE