Study of fractional vegetation cover using high spectral resolution data

Autor: Ajay Shiwalkar, Nikunj Patel, R. K. Saxena
Rok vydání: 2007
Předmět:
Zdroj: Journal of the Indian Society of Remote Sensing. 35:73-79
ISSN: 0974-3006
0255-660X
DOI: 10.1007/bf02991835
Popis: A field experiment was conducted to study the effect of vegetation cover on soil spectra and relationship of spectral indices with vegetation cover. Multi-date spectral measurements were carried out on twelve wheat fields. Five sets of measurements were taken during the growth period of wheat crop. Field reflectance data were collected in the range 350 to 1800 nm using ASD spectroradiometer. Analysis of data was done to select narrow spectral bands for estimation of ground cover. The ratio of reflectance from vegetation covered soil and reflectance from bare soil indicated that spectral reflectance at 670 and 710 nm are the most sensitive bands. Two bands in visible (670 and 560 nm), three bands in near infrared (710, 870 and 1100 nm) and three bands in middle infrared (1480, 1700 and 1800 nm) were found highly correlated with fractional cover. Vegetation indices developed using narrow band spectral data have been found to be better than those developed using broad- band data for estimation of ground cover.
Databáze: OpenAIRE
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