Becker, Carol J. Runkle, Donna Rea, Alan 1997 1.0 map Open-File Report 96-450 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr96-450_aqbound This data set consists of digitized aquifer boundaries for the Enid isolated terrace aquifer in northwestern Oklahoma. The Enid isolated terrace aquifer covers approximately 82 square miles and supplies water for irrigation, domestic, municipal, and industrial use for the City of Enid and western Garfield County. The Quaternary-age Enid isolated terrace aquifer is composed of terrace deposits that consist of discontinuous layers of clay, sandy clay, sand, and gravel. The aquifer is unconfined and is bounded by the underlying Permian-age Hennessey Group on the east and the Cedar Hills Sandstone Formation of the Permian-age El Reno Group on the west. The Cedar Hills Sandstone Formation fills a channel beneath the thickest section of the Enid isolated terrace aquifer in the midwestern part of the aquifer. The aquifer boundaries were digitized and created from information and maps in a ground-water modeling thesis and report of the Enid isolated terrace aquifer. The map digitized was published at a scale of 1:62,500. This data set was created for a project to develop data sets to support ground-water vulnerability analysis. The objective was to create and document a digital geospatial data set from a published report or map that could be used in ground-water vulnerability analysis. Introduction -- This data set consists of digitized aquifer boundaries for the Enid isolated terrace aquifer in northwestern Oklahoma. The Enid isolated terrace aquifer covers approximately 82 square miles and supplies water for irrigation, domestic, municipal, and industrial use for the City of Enid and western Garfield County (Beausoleil, 1981). The Quaternary-age Enid isolated terrace aquifer is composed of terrace deposits that consist of discontinuous layers of clay, sandy clay, sand, and gravel. The aquifer is unconfined and is bounded by the underlying Permian-age Hennessey Group on the east and the Cedar Hills Sandstone Formation of the Permian-age El Reno Group on the west. The Cedar Hills Sandstone Formation fills a channel beneath the thickest section of the Enid isolated terrace aquifer in the midwestern part of the aquifer (Beausoleil, 1981). The aquifer boundaries were digitized from a photocopy of a paper map from the ground-water modeling thesis, "A ground-water management model for the Enid isolated terrace aquifer in Garfield County, Oklahoma," by Beausoleil (1981, plate 4). The source map, plate 4, was published at a scale of 1:62,500. This data set represents the aquifer boundaries as interpreted by Beausoleil (1981). The aquifer boundaries also were used in the ground-water model by Kent, Beausoleil, and Witz (1982). Reviews Applied to Data -- This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. Reviewers were given digital data sets and paper plots for checking against the source maps to verify the linework and attributes. The reviewers checked the metadata and a_readme.1st files for completeness and accuracy. Related Spatial and Tabular Data Sets -- This data set is one of four digital map data sets being published together for this aquifer. The four data sets are: > aqbound - aquifer boundaries > cond - hydraulic conductivity > recharg - aquifer recharge > wlelev - water-level elevation contours Digital map data sets of the Oklahoma surficial geology digitized from 1:250,000-scale maps (or 1:125,000-scale maps for the three Oklahoma panhandle counties) are published separately. Other References Cited -- Beausoleil, Y.J., 1981, A ground-water management model for the Enid isolated terrace aquifer in Garfield County, Oklahoma: Stillwater, OK, Oklahoma State University, master's thesis, 66 p., 4 pls., 25 figs. Kent, D.C., Beausoleil, Y.J. and Witz, F.E., 1982, Evaluation of aquifer performance and water supply capabilities of the Enid isolated terrace aquifer in Garfield County, Oklahoma: Stillwater, OK, Department of Geology, Oklahoma State University report, 58 p., 19 figs. (Final report to the Oklahoma Water Resource Board) Notes -- Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. 1981 publication date Complete None planned -97.9734 -97.7536 36.5137 36.3665 none ground-water vulnerability groundwater vulnerability aquifers ground water groundwater Enid isolated terrace aquifer Enid terrace aquifer Enid aquifer terrace aquifer terrace deposit aquifer boundary inlandWaters none northwestern Oklahoma None. This data set was digitized from a map published at a scale of 1:62,500 and represents the aquifer boundaries as reported by Beausoleil (1981) on plate 4. Aquifer boundaries represented at this scale are indicative of broad, regional trends and should not be interpreted as site specific. The aquifer boundaries were digitized from a photocopy of a paper map (17.0 inches by 17.5 inches) with a maximum registration root-mean-squared error (RMSE) of 0.004 map inches (0.010 map centimeters) and 19.7 feet (6 meters) ground distance. Carol J. Becker U.S. Geological Survey Hydrologist mailing address

202 NW 66th St., Bldg. 7

Oklahoma City Oklahoma 73116 United States of America 1-888-275-8747 (405) 843-7712 cjbecker@usgs.gov none http://water.usgs.gov/lookup/get?OFR96-450/browse.gif A browse image of the four aquifer data sets. GIF Compilation of this data set and the associated metadata was funded under a cooperative Joint Funding Agreement between the U.S. Geological Survey and the State of Oklahoma, Office of the Secretary of Environment. Public UNCLASSIFIED None Operating System-- UNIX, ARC/INFO Version 7.0.3,(Mon Mar 13 22:21:55 PST 1995) Polygon and chain-node topology present. This data set includes all the aquifer boundaries published on plate 4 by Beausoleil (1981). None 29 meters Resolution as reported None. A tic coverage was created using township and range corners from 1:24,000 scale U.S. Geological Survey quadrangle maps. 19960830 Four tics were registered on the source map with a maximum registration root-mean-squared error (RMSE) of 0.004 map inches (0.010 map centimeters) and 19.7 feet (6 meters) ground distance. The aquifer boundaries were digitized in one session. The lines were attributed for LSOURCE and the polygon was attributed for AQTYPE. The coverage was documented. 19960905 Vector Point 1 String 3 GT-polygon composed of chains 2 Albers Conical Equal Area 29.5 45.5 -96 23 0.0 0.0 coordinate pair 29 meters 29 meters METERS North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 AQBOUND.PAT Polygon attribute table of AQBOUND ARC/INFO - Polygon attribute table of AQBOUND ARC/INFO - n/a n/a AREA Area of polygon in square coverage units Computed Positive real numbers n/a n/a PERIMETER Perimeter of polygon in coverage units Computed Positive real numbers n/a n/a AQBOUND# Internal feature number Computed Sequential unique positive integer n/a n/a AQBOUND-ID User-assigned feature number User-defined Integer n/a n/a AQTYPE Aquifer type Beausoleil (1981) 1 n/a n/a MAJOR1 Aquifer type Beausoleil (1981) 1 n/a n/a MINOR1 Blank item for DLG Calculated 0 n/a n/a AQBOUND.AAT Arc attribute table ARC/INFO - Arc attribute table ARC/INFO - n/a n/a FNODE# Internal number of from-node Computed Sequential unique positive integer n/a n/a TNODE# Internal number of to-node Computed Sequential unique positive integer n/a n/a LPOLY# Internal number of polygon to left of arc Computed Sequential unique positive integer n/a n/a RPOLY# Internal number of polygon to right of arc Computed Sequential unique positive integer n/a n/a LENGTH Length of arc in coverage units Computed Positive real numbers n/a n/a AQBOUND# Internal feature number Computed Sequential unique positive integer n/a n/a AQBOUND-ID User-assigned feature number User-defined Integer n/a n/a LSOURCE Source of line Beausoleil (1981) 1 n/a n/a MAJOR1 Source of line Beausoleil (1981) 1 n/a n/a MINOR1 Blank item for DLG Calculated 0 n/a n/a The polygon in this data set has an associated attribute, AQTYPE, with a value of 1 representing where the aquifer is present. AQTYPE is stored in the first major code (MAJOR1) for polygons, and 0 is stored in the first minor code (MINOR1) in the Digital Line Graph (DLG) version of this data set. Each line in this digital data set has an associated attribute, LSOURCE, that contains a code to indicate the source of the line. The LSOURCE code of 1 indicates the line was digitized from Beausoleil (1981). LSOURCE is stored in the first major code (MAJOR1) for lines, and 0 is stored in the first minor code (MINOR1) in the Digital Line Graph (DLG) version of this data set. See overview. U.S. Geological Survey Ask USGS - Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-450_aqbound Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-450_aqbound.e00.gz Other DLG file format zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-450_aqbound.dlg.gz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-450_aqbound FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998