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Water SA

On-line version ISSN 0378-4738

Water SA vol.34 n.2 Pretoria Feb. 2008

 

A comparison of satellite hyperspectral and multispectral remote sensing imagery for improved classification and mapping of vegetation

 

 

M GovenderI; K ChettyII; V NaikenI; H BulcockII

ICSIR Natural Resources and the Environment, c/o School of Environmental Sciences, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209, South Africa
IISchool of Bioresources Engineering and Environmental Hydrology, University of KwaZulu-Natal, Private Bag X01, Scottsville 3209, South Africa

Correspondence

 

 


ABSTRACT

In recent years the use of remote sensing imagery to classify and map vegetation over different spatial scales has gained wide acceptance in the research community. Many national and regional datasets have been derived using remote sensing data. However, much of this research was undertaken using multispectral remote sensing datasets. With advances in remote sensing technologies, the use of hyperspectral sensors which produce data at a higher spectral resolution is being investigated. The aim of this study was to compare the classification of selected vegetation types using both hyperspectral and multispectral satellite remote sensing data. Several statistical classifiers including maximum likelihood, minimum distance, mahalanobis distance, spectral angular mapper and parallelepiped methods of classification were used. Classification using mahalanobis distance and maximum likelihood methods with an optimal set of hyperspectral and multispectral bands produced overall accuracies greater than 80%.

Keywords: hyperspectral, multispectral, satellite data, statistical classifiers, vegetation classification


 

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Received 27 November 2007
Accepted in revised form 15 February 2008