Jason R. Masoner, David S. Burden, and Tom E. Short 2002 1.0 vector digital data Open-file Report 02-264 Reston, VIrginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?geology Masoner, Jason R.; Burden, David S.; Short, Tom E. 2002 http://pubs.er.usgs.gov/publication/ofr02264 This digital data set contains geologic formations for the 1:250,000-scale Sherman quadrangle, Texas and Oklahoma. The original data are from the Bureau of Economic Geology publication, "Geologic Atlas of Texas, Sherman sheet", by J.H. McGowen, T.F. Hentz, D.E. Owen, M.K. Pieper, C.A. Shelby, and V.E. Barnes, 1967, revised 1991. This data set was created for use in a regional ground-water model of the Lake Texoma watershed for a project by the U.S. Environmental Protection Agency, National Risk Management Research Laboratory located in Ada, Oklahoma, titled "Development of protocols and decision support tools for assessing watershed system assimilative capacity, in support of risked-based ecosystem management and restoration practices." Although this data set was created for use in a specific project, it may be used to make geologic maps, and determine approximate areas and locations of various geologic units. The file "/stratig.pdf" provides detailed descriptions of the stratigraphic nomenclature used in this data set. Additional geology data sets are available for Oklahoma at URL http://ok.water.usgs.gov/public/gis/geology/index.html. The source maps for three counties in the Oklahoma panhandle are at a scale of 1:125,000. The source maps for the rest of Oklahoma are at a scale of 1:250,000. The original geology source map was published in the Transverse Mercator Projection, Zone 14. This data set was projected to an Albers Equal Area projection (Synder, 1987), cast on the North American Datum of 1983. 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 were asked to check the metadata and accompanying files for completeness and accuracy. References Cited: Environmental Systems Research Institute, Inc. (ESRI), 2000, ARC/INFO Command References, ARC/INFO Version 7.1 ArcDoc: Redlands, CA. [online documentation]. McGowen, J.H., Hentz, T.F., Owen, D.E., Pieper, M.K., Shelby, C.A., and Barnes, V.E., (1991), Geologic Atlas of Texas, Sherman sheet, North-Central Texas, South-Central Oklahoma, revised: Bureau of Economic Geology, scale 1:250,000 Snyder, J.P., 1987, Map projections--A working manual: U.S. Geological Survey Professional Paper 1395, 383 p. 1967 revised 1991 publication date In work None planned -98.025946 -95.999888 34.017369 32.982604 None Geology Sherman Geologic formations Geologic unit Texas Oklahoma Geologic faults Faults inlandWaters None. There is uncertainity in the position of geologic contacts from the field mapping process, the original map preparation, and the scanning process. Due to the absence of boundaries of some water bodies being absent from the original geologic map and therefore added to the data set by scanning the paper map, some misalignment may occur between boundaries of water bodies and geologic contacts. It may be inappropriate to use this data set at scales larger than 1:250,000. Jason R. Masoner U.S. Geological Survey Hydrologist mailing address

202 NW 66th St., Bldg. 7

Oklahoma City OK 73116 USA 1-888-275-8747 405-843-7712 jmasoner@usgs.gov Please use email. http://water.usgs.gov/GIS/browse/geology_texas.jpg Illustration of data set .jpg Compilation of this data set and associated metadata was funded under an Interagency Agreement between the U.S. Environmental Protection Agency, National Risk Management Laboratory, and the U.S. Geological Survey. Resource Analysis and Mapping with Oklahoma State University scanned the original geologic contact prints. Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.1.649 Polygon and chain-node topology present. This data set includes surficial geology for the Sherman 1:250,000-scale quadrangle. 250,000 map The original geologic formation contact map was provided by the Bureau of Economic Geology in Austin, Texas, and duplicated on a velox photographic print. The print was scanned using a ANATech 3640 Eagle optical scanner at a four hundred dots per inch resolution. The resulting image was imported into LTPlus, a enhanced software package designed to replace the line Trace System at the USDA-FS, where it was registered and edited as a raster image. The raster image was converted to a DLG3 vector (polygon) data set and imported in GRASS GIS software to inspect polygon topology and identify errors or problem areas. Corrections were made to the original raster image in LTPlus based upon errors identified in GRASS. The raster image was converted to a vector polygon format and manual attributing was performed. The data set was exported to DLG3 format and imported into ARC/INFO version 7.1. Because the original geology negative lacked about a dozen small water bodies, the process from scanning to LTPlus to GRASS to ARC/INFO was repeated using the 1:250,000-scale Sherman published paper map in order to capture these missing water bodies. The two data sets were merged together using the UNION command (ESRI, ver. 7.1). Further editing was implemented using ARCEDITto improve overall quality of the geology data set. Types of edits performed were corrections of dangles or pseudo nodes within polygons and removal of unnecessary arcs and label errors. The original geology negative and the published map were in the Transverse Mercator Projection, Zone 14, and was cast on the North American Datum of 1927. This geology data set was projected to an Albers Equal Area projection (Synder, 1987), cast on the North American Datum of 1983. Vector Complete chain 5381 Label point 2353 GT-polygon composed of chains 2353 Point 4 Albers Conical Equal Area 29.500000 45.500000 -96.000000 23.000000 0.000000 0.000000 coordinate pair 0.000512 0.000512 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 geology.aat Arc feature attribute table FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal number of from-node Computed Whole numbers that are automatically generated. TNODE# Internal number of to-node Computed Whole numbers that are automatically generated. LPOLY# Internal number of polygon to left of arc Computed Whole numbers that are automatically generated. RPOLY# Internal number of polygon to right of arc Computed Whole numbers that are automatically generated. LENGTH Length of arc in data set units Computed Positive real numbers that are automatically generated. GEOLOGY# Internal feature number Computed Sequential unique whole numbers that are automatically generated. GEOLOGY-ID User-assigned feature number User-assigned number geology.pat Polygon feature attribute table FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of polygon in square data set units Computed Positive real numbers that are automatically generated. PERIMETER Perimeter of polygon in data set units Computed Positive real numbers that are automatically generated. GEOLOGY# Internal feature number Computed Sequential unique whole numbers that are automatically generated. GEOLOGY-ID User-assigned feature number User-assigned number ID Number representing geologic formation User-assigned number 1 - 110 unspecified unspecified CODE Geologic formation from source map Geologic Atlas of Texas, Sherman sheet FORMATION Geologic formation description from source map Geologic Atlas of Texas, Sherman sheet Two items of significance in this data set are the "Code" item and the "Formation" item. The "Code" item contains an ASCII character approximation of the map symbol for the name of the geologic unit or geologic formation. The "Formation" item contains an ASCII character approximation of the map stratigraphic nomenclature of the geologic unit or geologic formation. The file stratigraphic.pdf conains a detailed listing of the stratigrphic nomenclature for this dataset. 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://water.usgs.gov/user_feedback_form.html 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/geology.e00.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+geology FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998