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2003 Snake/Salt River Basins Plan
GIS Products

 Annual Precipitation (2003)
This ftp site contains vector and polygon coverages of average monthly and annual precipitation for the climatological period 1961-90. Parameter-elevation Regressions on Independent Slopes Model (PRISM) derived raster data is the underlying data set from which the polygons and vectors were created. PRISM is an analytical model that uses point data and a digital elevation model (DEM) to generate gridded estimates of annual, monthly and event-based climatic parameters. Detailed descriptions of the PRISM raster data can be found with the accompanying raster data sets. For further information, the online PRISM homepage can be found at .
 Metadata  Scale: 1:250,000  PRISM Group
 Shapefile  Compressed: 403kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Basin Boundary (2003)
This dataset contains displays the boundaries of the Snake/Salt River Basin Plan for Wyoming mapped at a 1:24,000 scale.
 Metadata  Scale: 1:24,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 128kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Bedrock Geology (2003)
The geologic map was digitized from original scribe sheets used to prepare the published Geologic Map of Wyoming (Love and Christiansen, 1985), consequently at a 1:500,000 scale. The dataset has both polygon and line features (faults), with attributes derived from the 1985 map.
 Metadata  Scale: 1:500,000  U.S. Geological Survey
 Shapefile  Compressed: 698kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Cities and Towns (2003)
Snake/Salt River Basin Plan - Cities and Towns at 1:24,000 scale
 Metadata  Scale: 1:24,000  Sunrise Engineering
 Shapefile  Compressed: 5kb  GCS North American Datum of 1927  Point/Decimal Degrees
 County Boundaries (2003)
This dataset contains information on the county boundaries and names for Wyoming mapped at a 1:100,000 scale.
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 133kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Faults (2003)
Data was digitized from original scribe sheets used to prepare the published Geologic Map of Wyoming (Love and Christiansen, 1985), consequently at a 1:500,000 scale.
 Metadata  Scale: 1:500,000  U.S. Geological Survey
 Shapefile  Compressed: 146kb  GCS North American Datum of 1927  Polyline/Decimal Degrees
 Groundwater Wells (2003)
Contains approximately 15,600 point locations of Wyoming well permit locations on file with the Wyoming State Engineer's Office. The wells have been located to the to the nearest 40 acre parcel. All locational information and attributes were imported from the Wyoming State Engineer's Office Well Permits Database stored in SQL-Server.
 Metadata  Scale: 1:24,000  Wyoming State Engineer's Office
 Shapefile  Compressed: 226kb  GCS North American Datum of 1927  Point/Decimal Degrees
 HUC 250 Boundaries (2003)
The Geographic Information Retrieval and Analysis System (GIRAS) was developed in the mid 70s to put into digital form a number of data layers which were of interest to the USGS. One of these data layers was the Hydrologic Units. The map is based on the Hydrologic Unit Maps published by the U.S. Geological Survey Office of Water Data Coordination, together with the list descriptions and name of region, subregion, accounting units, and cataloging unit. The hydrologic units are encoded with an eight- digit number that indicates the hydrologic region (first two digits), hydrologic subregion (second two digits), accounting unit (third two digits), and cataloging unit (fourth two digits). The data produced by GIRAS was originally collected at a scale of 1:250,000. This data set is a modification for Wyoming of the original United States HUC data produced by the USGS. The primary modifications made in this data set by the Wyoming Water Resources Center include 1) removal of hydrologic units that do not drain within Wyoming and 2) modification of the hydrologic unit boundaries to better encompass streams and lakes represented in the 1:100,000 scale Digital Line Graph (DLG) of surficial hydrography. This metadata has also been altered from original USGS metadata to be more specific for Wyoming.
 Metadata  Scale: 1:250,000  U.S. Geological Survey
 Shapefile  Compressed: 112kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Irrigated Lands (2003)
This data set is a polygon coverage. It only contains irrigated acreage in the Snake/Salt River basin within Wyoming. The interpretation of irrigated lands due to the works of man was taken from 1982 and 1983 aerial infra-red photos. Upon completion of digitizing these areas, Wyoming State Engineer's Office field personnel updated the lands and checked the accuracy of the delineation. The data structure for this data set is based on graph theory, in which a two-dimensional diagram is expressed as a set of spatial objects in a manner that explicitly expresses logical relationships. Applied to a map, this concept is used to encode the spatial relationships between the objects, including such concepts as adjacency and connectivity between objects. A topologically structured data file can support graphic applications, as well as computations and analyses involving the spatial objects and their spatial relationships.
 Metadata  Scale: 1:24,000  States West Water Resources Corporation
 Shapefile  Compressed: 45kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Irrigation Points of Diversion (2003)
This dataset contains the locations of points of diversion for the irrigated lands mapped for the Snake/Salt River Basin Plan.
 Metadata  Scale: 1:24,000  Wyoming State Engineer's Office
 Shapefile  Compressed: 24kb  GCS North American Datum of 1927  Point/Decimal Degrees
 Land Survey - Section,Township, and Range (2003)
This dataset represents a 1:100,000 scale Public Land Survey System layer for Wyoming. It was digitized from 57 different paper copies of BLM Surface Management Status series maps for Wyoming. (One map was from Idaho but covered a small section of Wyoming.)
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 298kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Land Survey - Township and Range (2003)
This dataset represents a 1:100,000 scale Public Land Survey System layer for Wyoming. It was digitized from 57 different paper copies of BLM Surface Management Status series maps for Wyoming. (One map was from Idaho but covered a small section of Wyoming.)
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 70kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Major Lakes (2003)
Hydrographic features for Wyoming at 1:100,000-scale, including perennial and intermittent designations and Strahler stream order attributes for streams. Does not include man-made ditches, canals and aqueducts. The data was originally produced by USGS, a Digital Line Graph (DLG) product, though this product was enhanced (edgematched, some linework and attributes corrected, stream order attribute added). A subset of this dataset is also available for distribution, including only major streams (order 4 to 7) and major lakes and reservoirs. In order to reduce the size of this subset, the line segments were dissolved to remove unncessary segments. Both datasets are available in Arc export file and shapefile format for download (see Onlink_Linkage) Statewide and tiled data: there is one export file, which when imported into ARC/INFO, will contain one coverage with both polygon (lakes, reservoirs) and line (streams) topology and two feature attribute files (.PAT and .AAT) along with three additional attribute files containing descriptive information. In shapefile format, there will be two shapefiles (polygons and lines separated), with all attribute files in Dbase format.
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 190kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Major Reservoirs (2003)
Hydrographic features for Wyoming at 1:100,000-scale, including perennial and intermittent designations and Strahler stream order attributes for streams. Does not include man-made ditches, canals and aqueducts. The data was originally produced by USGS, a Digital Line Graph (DLG) product, though this product was enhanced (edgematched, some linework and attributes corrected, stream order attribute added). A subset of this dataset is also available for distribution, including only major streams (order 4 to 7) and major lakes and reservoirs. In order to reduce the size of this subset, the line segments were dissolved to remove unncessary segments. Both datasets are available in Arc export file and shapefile format for download (see Onlink_Linkage) Statewide and tiled data: there is one export file, which when imported into ARC/INFO, will contain one coverage with both polygon (lakes, reservoirs) and line (streams) topology and two feature attribute files (.PAT and .AAT) along with three additional attribute files containing descriptive information. In shapefile format, there will be two shapefiles (polygons and lines separated), with all attribute files in Dbase format.
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 87kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Major Streams (2003)
Hydrographic features for Wyoming at 1:100,000-scale, including perennial and intermittent designations and Strahler stream order attributes for streams. Does not include man-made ditches, canals and aqueducts. The data was originally produced by USGS, a Digital Line Graph (DLG) product, though this product was enhanced (edgematched, some linework and attributes corrected, stream order attribute added). A subset of this dataset is also available for distribution, including only major streams (order 4 to 7) and major lakes and reservoirs. In order to reduce the size of this subset, the line segments were dissolved to remove unncessary segments. Both datasets are available in Arc export file and shapefile format for download (see Onlink_Linkage) Statewide and tiled data: there is one export file, which when imported into ARC/INFO, will contain one coverage with both polygon (lakes, reservoirs) and line (streams) topology and two feature attribute files (.PAT and .AAT) along with three additional attribute files containing descriptive information. In shapefile format, there will be two shapefiles (polygons and lines separated), with all attribute files in Dbase format.
 Metadata  Scale: 1:100,000  Wyoming Geographic Science Center
 Shapefile  Compressed: 1,221kb  GCS North American Datum of 1927  Polyline/Decimal Degrees
 National Wetlands Inventory (2003)
Original digital National Wetland Inventory digital line graphs, source scale approximately 1:24,000, converted into Arc/Info coverages with matching attributes. See graphic image or on-line linkage for availability of these quadrangles in Wyoming.
 Metadata  Scale: 1:24,000  U.S. Fish and Wildlife
 Shapefile  Compressed: 10,706kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Short List of Future Opportunities (2003)
Locations of Basin proposed projects
 Metadata  Scale: 1:24,000  Sunrise Engineering
 Shapefile  Compressed: 6kb  GCS North American Datum of 1927  Point/Decimal Degrees
 Soils (2003)
This dataset represents soils of Wyoming at 1:500,000- scale. The layer contains 45 separate soils descriptions across 10 Wyoming soil zones. The layer was compiled based on the five-factor soil forming model using digital surficial geology, bedrock geology, and elevation. This dataset is documented in the report: Munn, L.C. and C.S. Arneson, 1998. Soils of Wyoming: A Digital Statewide Map at 1:500,000-Scale. Agricultural Experiment Station Report B-1069. University of Wyoming, College of Agriculture, Laramie, Wyoming.
 Metadata  Scale: 1:500,000  University of Wyoming
 Shapefile  Compressed: 2,913kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Surficial Geology (2003)
This dataset represents surficial geology of Wyoming at 1:500,000-scale. The layer contains 577 separate surficial feature (landforms) and deposit descriptions present on the surface in the state. Compiled from aerial photography and existing maps this layer represents the first comprehensive surficial geology map of Wyoming.
 Metadata  Scale: 1:500,000  Wyoming State Geological Survey
 Shapefile  Compressed: 3,509kb  GCS North American Datum of 1927  Polygon/Decimal Degrees
 Transportation - Interstates, Highways, Roads (2003)
Transportation for Wyoming, including interstates, state and county highways, neighborhood and connecting roads, jeep trails, and other road and trail types, developed by the US Census at 1:100,000-scale. The Wyoming Water Resources Lab has tiled this information together by 1:100,000 quadrangles for Wyoming and created an attribute table which contains a description of the primary road/trail attribute, CFCC. A subset of this dataset is also available, including only federal and state highways for simplified display purposes. In order to reduce the size of this subset, the line segments were dissolved to remove unecessary segments. The data is available (both statewide and tiles) in ARC/INFO export file format and in ArcView shapefile format.
 Metadata  Scale: 1:100,000  U.S. Census Bureau
 Shapefile  Compressed: 712kb  GCS North American Datum of 1927  Polyline/Decimal Degrees
 Weather Stations (2003)
The dataset's original extent, coordinate system, and data attributes have been altered. The dataset has been clipped to the extents of the Snake/Salt Basin Boundary (6th level hydrologic unit code watershed boundaries). The coordinate system has been changed to Lat/Long NAD 1927, and various data attributes have been excluded. These data alterations occurred in the Spring of 2003 for use in the Wyoming Water Development Commission's Snake/Salt River Basin Plan.
 Metadata  Scale: unknown  Water Resources Data System
 Shapefile  Compressed: 15kb  GCS North American Datum of 1927  Point/Decimal Degrees

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