This image was generated using the June 22, 1991 Landsat TM data. Spectral bands 2 (green), 3 (red), and 4 (near infrared) were used to generate the color composite. Vegetation is red due to its high reflectance in the near infrared spectral band, which was used as the red component in the color composite. Landmarks that can easily be identified and are labeled in Figure 1 are: Flagstaff, Mount Elden, the airport, Interstates 17 and 40, and upper Lake Mary. Also seen on this image are: Mormon Lake, Oak Creek Canyon, southern base of the San Francisco Peaks, and Camp Navajo. This image was collected during the time of year that has a near maximum sun elevation angle, which is not ideal for the enhancement of structural information; however, some of the regional structural patterns can be seen on this product.

This image was generated using the January 15, 1983 Landsat TM data. As in Figure 1, spectral bands 2 (green), 3 (red), and 4 (near infrared) were used to generate the color composite. Vegetation is also red in this composite because the same spectral band combination was used. Some of the same landmarks can be seen, but due to the snow cover and lower background contrast they do not stand out as nicely. This image was collected close to the time of year that has a near minimum sun elevation angle, which is optimal for structural enhancement; therefore, most of the structural information was enhanced more than in the summer/June image shown in Figure 1. Keep in mind that this is a single static representation of the digital image; the digital image can be manipulated using image processing tools and procedures to selectively enhance both regional and/or local areas of interest interactively.

This image was generated using the June 22, 1991 Landsat TM data. Spectral bands 2 (green), 4 (near infrared), and 5 (mid-infrared) were used to generate the color composite. In this case, vegetation is green because the near infrared spectral band was used as the green component in the color composite. The image covers a smaller area than Figures 1 and 2 because it is at a larger scale (zoomed). Several landmarks are labeled on this image: Flagstaff, Mount Elden, Interstates 17 and 40, the airport, and upper Lake Mary are labeled on this image. Note the regional and local structural information that can be seen at this scale.

This image is the results of using the DEM data to introduce parallax into the Landsat TM image collected on June 22, 1991 to generate a stereo image. The near infrared spectral band (TM band 4) was used to generate the stereo image; to see the 3-D topographic component use the red and blue glasses (red on the left). This type of digital merging allows the information contents of two different data sets to be combined and viewed together. It basically 'lays' the satellite image on top of the topography so that the best of both data sets can be seen simultaneously. The landmarks identified in previous figures can also be seen in this image (e.g., Lake Mary, Mount Elden, Oak Creek Canyon fault, and Flagstaff).

This is identical to the image product shown in Figure 11 except that the Landsat TM image collected on January 15, 1983 was used rather than the June 22, 1991 TM image. This image has some snow cover and goes far enough north to include the San Francisco Peaks. Generally, structural features are enhanced better in this image due to the lower sun elevation angle during the winter. The 3-D topographic component can be seen using the red and blue glasses (red on the left).