False color composite image of Phoenix, Arizona.  Image width equals 92 km.  This Landsat thematic mapper image 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 center of the image.  Image acquisition date is June 24, 1992.

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