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    1. [GASCREVE] Regarding maps.
    2. Dale E Reddick
    3. Hello all, Here's how to find the USGS aerial photographic maps: NAPP, the National Aerial Photography Program, is an interagency Federal effort coordinated by the USGS, which uses NAPP products to revise maps. Other agencies have many other uses for these photographs, which, taken on roughly a 5-year cycle and produced to rigorous specifications, cover the entire lower 48 states. The photos are shot from airplanes flying at 20,000 feet. Each 9-by 9-inch photo (without enlargement) covers an area a bit more than 5 miles on a side. http://edcwww.cr.usgs.gov/Webglis/glisbin/finder_main.pl?dataset_name=NAPP Since these maps are printed as 9 by 9 photographs, then it probably necessary to use either a high-magnification imager or a scanner to view details on these photos. Once scanned, then review of the aerial maps can be done with the computer and an image viewing software application. - ------------------------------------------------------------------------ For topographic maps the following site allows you to place orders online: The 7.5-minute map series (1:24,000 scale) is one of several standard series maps produced by the US Geological Survey (USGS). One inch on a 7.5 minute map represents 2000 feet on the ground. Paper prints of this series, which are approximately 22 x 27 inches, can be ordered from this site. http://edcwww.cr.usgs.gov/Webglis/glisbin/finder_main.pl?dataset_name=MAPS_LARGE Each of these webpages has a way to enter a name or ZIP Code for a location. Then, just choose the appropriate map for the area you are interested in. Dale E. Reddick

    08/08/2000 03:28:47