Content Citation
Title of Content:  Preliminary Geologic Map of the Foss Reservoir 30’ X 60’ Quadrangle, Beckham, Custer, Dewey, Ellis, and Roger Mills Counties, Oklahoma
Author:  Robert O. Fay
Series Name, Identification:  Oklahoma Geologic Quadrangle Maps, OGQ-78A
Type of Content:  Downloadable Data
Content Publisher:  Oklahoma Geological Survey, 	Norman, OK
Publication Date:  2010
Online:  http://www.ogs.ou.edu/geolmapping.php

Content Description
Abstract:  Preliminary geologic map data of the Foss Reservoir 30’ X 60’ quadrangle, Beckham, Custer, Dewey, Ellis, and Roger Mills Counties, Oklahoma, map OGQ-78A.  Compilation conducted under the STATEMAP component of the National Cooperative Geologic Mapping Program (NCGMP), award number 1434-HQ-96-AG-0512.  In 1996–1997, the Watonga and Foss Reservoir quadrangles were compiled to test OGS compilation efforts and digital capabilities for the NCGMP 1:100K digital mapping. The digital maps were never published. Currently underway, the geology is being field checked and new mapping being done, where needed.  A preliminary geologic map has been made available until a final map can be published.
Purpose:  Provide a geologic map data set for the Foss Reservoir 30’ X 60’ quadrangle to be used in non site-specific investigations.  

Spatial Reference
Spatial Domain:  West Coordinate:  -100.00; East Coordinate:  -99.00; North Coordinate:  36.00; South Coordinate:  35.50
Coordinate System:  Universal Transverse Mercator, Zone 14N
Datum:  North American Datum of 1927 (NAD27)

Data Quality Information
Attribute Accuracy Report:  All labels have been checked and verified for identification and placement.  Consistent font size was also checked.  
Logical Consistency Report:  Geologic map data was visually compared to the geologist’s original hand-drafted maps for fullness and accuracy.  All geologic contacts were reviewed to make sure they conform to topography and regional dip.  Adjoining polygons are snapped together at common vertices along shared borders.  Polygons intersecting the quadrangle boundary are closed along the border.  Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area.  Line segments are a set of sequentially numbered coordinate pairs.  No duplicate features exist nor duplicate points in a data string.  Intersecting lines are separated into individual line segments at the point of intersection.  Point data are represented by two sets of coordinate pairs, each with the same coordinate values.  All vertices are represented by a single coordinate pair which indicates the beginning or end of a line segment.  

Completeness Report:  The geologic features and their attributes come from the information supplied by the map authors.  The map unit names along with the geologic symbols are from the authors.  The geologic map units represent surface and subsurface geology types.  The map and data has not been field checked.    

Horizontal Positional Accuracy Report:  USGS topographic map has an accuracy of approximately 166 ft.  Geologic map unit contacts have an accuracy of approximately 416 ft.  Geology not field checked.  
Vertical Accuracy Report:  Vertical accuracy is 5 m. or less based on the USGS topographic map (1:100,000).  

Spatial Data Information
The data set contains a USGS topographic DRG and geologic map features for the map.  These components of the data set are described below.  Map unit description and correlation can be found on the published PDF map. 
F35099E1.tif (TIF image)
Description:  A spatially referenced digital raster graphic (DRG) of a USGS topographic map
Originator:  U.S. Geological Survey
Publication Date:  1990
Title:  Foss Reservoir
Series Information:  30 X 60 Minute (Topographic)
Issue Identification:  35099-E1-TM-100

GeologicMap.lyr (ESRI ArcGIS layer file)
Description:  Symbology used for the published geologic map

MapUnitArea.shp (ESRI Shapefile)
Description:  Geologic map units that has a definable mapped area represented by a polygon
Attribute:  FID – Unique Feature Identification number for each row in table
Attribute:  Shape – Feature geometry
Attribute:  FM_NAME – Map unit name
Attribute:  FM_SYMBOL – Geologic symbol for map unit name

Disclaimer
The Oklahoma Geological Survey (OGS) provides these geologic data “as is”. The OGS makes no guarantee or warranty concerning the accuracy of information contained in the data. The OGS further makes no warranties, either expressed or implied, as to any other matter whatsoever including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the OGS, no warranty, expressed or implied, is made by the OGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
In no event shall the OGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geologic data or arising out of the delivery, installation, operation, or support by OGS.

Contact Information
Organization:  Oklahoma Geological Survey
Person:  Thomas M. Stanley, Geologist IV; Julie M. Chang, Geologist II; and/or G. Russell Standridge, GIS Specialist
Address:  100 E. Boyd, SEC Room N-131, Norman, OK  73019
Phone:  405-325-3031
Email:  tmstanley@ou.edu; jmchang@ou.edu; gstan@ou.edu