Adams, Gregory P. Runkle, Donna Rea, Alan 1997 1.0 map Open-File Report 96-447 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr96-447_wlelev This data set consists of digital water-level elevation contours for the alluvial and terrace deposits along the North Canadian River from Canton Lake to Lake Overholser in central Oklahoma. Ground water in approximately 400 square miles of Quaternary-age alluvial and terrace aquifer is an important source of water for irrigation, industrial, municipal, stock, and domestic supplies. The aquifer consists of clay, silt, sand, and gravel. Sand-sized sediments dominate the poorly sorted, fine to coarse, unconsolidated quartz grains in the aquifer. The hydraulically connected alluvial and terrace deposits unconformably overlie Permian-age formations. The aquifer is overlain by a layer of wind-blown sand in parts of the area. Water-level elevation contours, based on water-levels measured in 1980, were digitized from a folded paper map in a ground-water flow modeling report for the aquifer. The source map was published at a scale of 1:250,000. Water-level elevations in the alluvial and terrace deposits ranged from 1,600 feet above sea level in the northwest to 1,220 feet above sea level in the southeast. 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, or existing digital geospatial data sets that could be used in ground-water vulnerability analysis. Introduction -- This data set consists of digital water-level elevation contours for the alluvial and terrace deposits along the North Canadian River from Canton Lake to Lake Overholser in central Oklahoma. Ground water in approximately 400 square miles of Quaternary-age alluvial and terrace aquifer is an important source of water for irrigation, industrial, municipal, stock, and domestic supplies. The aquifer consists of clay, silt, sand, and gravel. Sand-sized sediments dominate the poorly sorted, fine to coarse, unconsolidated quartz grains in the aquifer. The hydraulically connected alluvial and terrace deposits unconformably overlie Permian-age formations. The aquifer is overlain by a layer of wind-blown sand in parts of the area (Christenson, 1983). In this report, elevation refers to distance above sea level and sea level refers to the National Gedodetic Vertical Datum of 1929 (NGVD29)--a geodetic datum derived from a general adjustment of the first-order level nets of both the United States and Canada, formerly called Sea Level Datum of 1929. The water-level elevation contours in this data set were digitized from a folded paper map in the ground-water modeling report, "Numerical simulation of the alluvium and terrace aquifer along the North Canadian River from Canton Lake to Lake Overholser, central Oklahoma," by Christenson (1983, plate 3), at a scale of 1:250,000. Water-level elevation contours, based on water-levels measured in 1980, ranged from 1,600 feet above sea level in the northwest to 1,220 feet above sea level in the southeast. 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 -- Cederstrand, J.R., 1996a, Digital geologic map of Clinton quadrangle, west-central Oklahoma: U.S. Geological Survey Open-File Report 96-373, based on a scale of 1:250,000, 2 diskettes. (Available in nonproprietary and ARC/INFO formats.) URL:http://ok.water.usgs.gov/gis/geology/index.html Cederstrand, J.R., 1996b, Digital geologic map of Oklahoma City quadrangle, central Oklahoma: U.S. Geological Survey Open-File Report 96-378, based on a scale of 1:250,000, 2 diskettes. (Available in nonproprietary and ARC/INFO formats.) URL:http://ok.water.usgs.gov/gis/geology/index.html Cederstrand, J.R., 1996c, Digital geologic map of Woodward quadrangle, northwest Oklahoma: U.S. Geological Survey Open-File Report 96-381, based on a scale of 1:250,000, 2 diskettes. (Available in nonproprietary and ARC/INFO formats.) URL:http://ok.water.usgs.gov/gis/geology/index.html Christenson, S.C., 1983, Numerical simulation of the alluvium and terrace aquifer along the North Canadian River from Canton Lake to Lake Overholser, central Oklahoma: U.S. Geological Survey Water Resources Investigations Report 83-4076, 36 p. Environmental Systems Research Institute, Inc. (ESRI), 1995, ARC/INFO Command Reference, ARC/INFO On-line manuals: Redlands, CA. 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. 1980 ground condition. Complete None planned -98.5673 -97.6716 36.1223 35.4955 none ground-water vulnerability groundwater vulnerability aquifers ground water groundwater North Canadian River alluvial and terrace aquifer North Canadian alluvial and terrace aquifer alluvial and terrace aquifer terrace aquifer alluvial aquifer terrace alluvium ground-water levels groundwater levels water levels ground-water level elevation groundwater level elevation ground-water level elevation contours groundwater level elevation contours water-level elevation contours water level elevation contours water-level contours water level contours water-level elevation water level elevation inlandWaters none central Oklahoma None. This data set was digitized from a map published at a scale of 1:250,000. The map represents the elevations of the water levels in the alluvial and terrace deposits along the North Canadian River from Canton Lake to Lake Overholser in central Oklahoma, during 1980 (Christenson, 1983). Water-level elevation contours represented at this scale are indicative of broad, regional trends and should not be interpreted as site specific. The water-level elevation contours were digitized from a folded paper map (19 inches by 17 inches) with a root-mean-squared-error (RMSE) of 0.008 map inches (0.020 map centimeters) or 175.32 feet (53.44 meters) ground distance. Donna L. Runkle 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 dlrunkle@usgs.gov none http://water.usgs.gov/lookup/get?OFR96-447/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) Cederstrand, Joel R. 1996 1.0 map Open-File Report 96-373 Oklahoma City, OK U.S. Geological Survey http://ok.water.usgs.gov/gis/geology/index.html Chain-node topology present. This data set includes all the water-level elevation contours published on plate 3 by Christenson (1983). None 100 meters Resolution as reported None. Nine registration tics, located at township and range corners, were projected into Universal Transverse Mercator-Zone 14 the projection used for manual digitizing. The boundaries were digitized in one session with a maximum registration root-mean-squared error (RMSE) of 0.008 inches map (0.020 centimeters) map distance or 175.32 feet (53.44 meters) ground distance. The water-level contours were extended or clipped according to digital geology data sets by Cederstrand (1996a, 1996b, 1996c). The data set was edited to delete extraneous pseudo and dangle nodes. The ARC/INFO CLEAN command (ESRI, 1995) was used with dangle length of 3,280.8 feet (1000.0 meters) and fuzzy tolerance of 328.1 feet (100.0 meters). In the initial digitizing, the registration tics used were township and range corners taken from 1:24,000-scale topographic maps. A comparison of a paper plot of the report data set with the source map showed that the corners used as registration tics were not in the same locations on the 1:250,000-scale aquifer map. To correct the problem, three 1:250,000-scale U.S. Geological Survey quadrangle maps were registered using latitudinal and longitudinal registration tics, with a maximum registration root-mean-squared-error (RMSE) of 0.008 inches (0.020 centimeters) map distance or 190.22 feet (57.98 meters) ground distance. Twenty-seven registration tics were selected and digitized from the quadrangle maps, and given the same tic identification numbers as the tics that were used initially. These new tics were used with the ARC/INFO TRANSFORM command (ESRI, 1995) to adjust the digitized lines to more closely match the source map. The root-mean-squared-error (RMSE) for TRANSFORM was 189.3 feet (57.7 meters) ground distance. The ARC/INFO PROJECT command (ESRI, 1995) was used to convert the data set projection from Universal Transverse Mercator-Zone 14 to Transverse Mercator, with central meridians of 99 and 97 degrees west longitude. A comparison of this transformed data set to the pretransformed data set showed no difference in the digitized water-level contours. The contours were attributed for ELEV and LTYPE. Verification of attribute codes were made by comparing a paper plot of the data set with the source map. The ARC/INFO PROJECT command (ESRI, 1995) was used to convert the coverage projection to Albers Conical Equal Area. 1996 Vector Point String 23 GT-polygon composed of chains Albers Conical Equal Area 29.5 45.5 -96 23 0.0 0.0 coordinate pair 100 meters 100 meters METERS North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 WLELEV.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 WLELEV# Internal feature number Computed Sequential unique positive integer n/a n/a WLELEV-ID User-assigned feature number User-defined Integer n/a n/a ELEV Water-level contour elevation in feet above NGVD29 Christenson (1983) 1,220 1,600 MAJOR1 Water-level contour elevation in feet above NGVD29 Christenson (1983) 1,220 1,600 LTYPE Line type Christenson (1993) 1 n/a n/a MINOR1 Line type Christenson (1993) 1 n/a n/a Two attributes are associated with each line in this digital data set. The first attribute, ELEV, contains the elevation of the water-level contour, expressed in feet above the National Geodetic Vertical Datum of 1929 (NGVD29). The second attribute, LTYPE, contains a code of 1 indicating the line is solid on the source map. ELEV is stored in the first major code (MAJOR1) for lines, and LTYPE 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+ofr96-447_wlelev 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/ofr96-447_wlelev.e00.gz Other DLG file format zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-447_wlelev.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+ofr96-447_wlelev FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998