Natural Resources, School of


Date of this Version



Published in Gap Analysis Bulletin (2003/2004) no. 12: 50-56. Published by the United States Department of the Interior and the United States Geological Survey. Also available at


In this brief note, the authors illustrate the prevalence of reduced sensitivity of the Normalized Difference Vegetation Index (NDVI), introduce the Wide Dynamic Range Vegetation Index (WDRVI), and illustrate the advantages of the WDVRI over the NDVI using Landsat ETM+ data that spans a range of canopy densities.