Land cover classification using multi-temporal MERIS vegetation indices
Abstract:The spectral, spatial, and temporal resolutions of Envisat's Medium Resolution Imaging Spectrometer (MERIS) data are attractive for regional- to global-scale land cover mapping. Moreover, two novel and operational vegetation indices derived from MERIS data have considerable potential as discriminating variables in land cover classification. Here, the potential of these two vegetation indices (the MERIS global vegetation index (MGVI), MERIS terrestrial chlorophyll index (MTCI)) was evaluated for mapping eleven broad land cover classes in Wisconsin. Data acquired in the high and low chlorophyll seasons were used to increase inter-class separability. The two vegetation indices provided a higher degree of inter-class separability than data acquired in many of the individual MERIS spectral wavebands. The most accurate landcover map (73.2%) was derived from a classification of vegetation index-derived data with a support vector machine (SVM), and was more accurate than the corresponding map derived from a classification using the data acquired in the original spectral wavebands.
Document Type: Research Article
Affiliations: 1: School of Geography, University of Southampton, Southampton, SO17 1BJ, UK 2: Punjab Remote Sensing Centre, PAU Campus, Ludhiana, 141004, India 3: School of Geography, University of Nottingham, Nottingham, NE7 2RD, UK 4: Office of the Vice-Chancellor, Bournemouth University, Talbot Campus, Fern Barrow, Poole, BH12 5BB, UK 5: Environmental Remote Sensing Center, University of Wisconsin-Madison, Madison, WI 53706
Publication date: January 1, 2007