Vegetation type maps covering approximately 13 million ha of east-central Alaska were made using Landsat multispectral scanner data to analyze moose (Alces alces) habitat. Modified clustering techniques were used: the clustering method has significant advantage over other methods for processing Landsat data. The most important advantage is that the maximum number of readily separable information classes contained in the data is identified and extracted early in the analysis. Other resource analysis applications are possible from this same basic array of classes.