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<br />V. Description of Data and Software: South Platte Geographic Information System (SPGIS) <br /> <br />Table 1: South Platte Mapping and Analysis Program Map Themes and Images <br /> <br />Theme Name Description <br />Lakes 24K Digitized from USGS quads by the Colorado Division of Wildlife, Aquatics, provided to IDS by <br /> the Northern Colorado Water Conservancy District. <br />NCWCD Weather Locations of weather stations maintained by Northern Water Conservancy District, data is <br />Stations populated in files for use in the SPCU Model. <br />NWS Weather Locations of weather stations maintained by the National Weather Service, data is populated <br />Stations in files for use in the SPCU Model. <br />PLSS 24K This theme describes the Public Land Survey System for eastern Colorado including section, <br />PLSS 100K township and range data obtained from USGS internet site at 30 minute resolution (1 :62,000). <br />Data was obtained in DLG format for over 200 separate tiles covering the northeastern portion <br />PLSS 100K (no of Colorado, the associated numeric codes were determined and the resulting coverages <br />sections) joined into seamless coverages <br />Roads Tiger Files - Vector information for highways and major roads. <br />Roads Minor Tiger Files - Vector information for minor roads, information includes road type. <br />South Platte River Digitized and edited by the IDS group from originals Hurr and Schneider (1972) provided by <br /> GASP. <br />State> 50 gpm Wells Subset of the Division 1 Wells, with a capacity of greater than 50 gallons per minute. <br />Stream Depletion Digitized from (Hurr and Schneider, 1972) for each reach in the South Platte River Basin. <br />Factor (SDF) Once this coverage was digitized and edited for errors, the South Platte River was added with <br />SDF Boundary a SDF value of O. ARC/INFO was used to generate a Triangular Irregular Network (TIN) line <br />coverage using ARC/TIN. The TIN coverage was used to generate SDF isolines for every ten <br />SDF10m days. The resulting coverage was then split into small segments and converted to the GIS <br />GRASS (Geographical Resources Analysis Support System) to generate 40 meter (0.59 <br /> acres) grid resolution raster maps. These raster maps were then joined for each Water District <br /> and exported back to ARC/lNFO for display. The resulting coverages for each Water District in <br /> Water Division 1 show an SDF value for each acre in the South Platte River Basin. <br />Streams 24K Digitized from USGS quads by the Colorado Division of Wildlife, Aquatics, provided to IDS by <br /> the Northern Colorado Water Conservancy District. <br />Water Districts The South Platte area is the same as the Water Division 1 area, therefore only the Water <br /> District boundaries within Division 1 are populated. United States Department of the Interior <br /> Geological Survey (USGS) digital line graphs (DLGs) data were used to populate this theme <br /> by the IDS Group at Colorado State University. <br />TM 30m Satellite The 30 meter color imagery was obtained from a satellite placed in orbit by the United States <br />Images Government. This satellite is commonly referred to as Landsat 5. The landsat imagery is <br /> multispectral (records reflected energy in the green, blue, red, near infrared, middle infrared, <br /> far infrared and thermal bands) and has a spatial resolution of 30 meters. The imagery was <br /> processed by the Northern Colorado Water Conservancy District in 1996. <br />Select IRS 5m The 5 meter grayscale imagery was obtained from a satellite placed in orbit by the government <br />Satellite B & W of India. This satellite is commonly referred to a the IRS-1C. The IRS-1C imagery is <br />Images panchromatic at a 5 meter pixel resolution. <br /> The IRS-1C imagery that is used for SPMAP is a mosaic of three different images. The shape <br /> of the merged imagery is an upside down "L" in which the lower leg was obtained May 5, 1996; <br /> the center was obtained on November 11, 1996; and the upper right leg was obtained on <br /> November 25, 1996. The imagery was processed by the Northern Colorado Water <br /> Conservancy District in 1996. <br /> <br />14 <br /> <br />Completion Report: South Platte Mapping and Analysis Program <br />