False color composite image of Scottsdale and northern Tempe, Arizona.  Image width equals 13.5 km.  This Landsat thematic mapper image is a section of Figure 4.  It overlays three digital images with red for band 6, green for the first principal component of bands 4, 5, and 7, and blue for the first principal component of bands 1, 2, and 3.  In general, green vegetation appears in tones of green; barren desert appears in tones of beige and brown; and urban surfaces are shown in tones of blue and purple.  The hot, and barren, runways of Sky Harbor airport appear in red, and can be seen near the lower left of the image.  Image acquisition date is June 24, 1992.

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