Identification_Information:
  Citation:
    Citation_Information:
      Originator: USGS
      Publication_Date:  20020109
      Title:  Stephenson, VA-WV
      Geospatial_Data_Presentation_Form: map
      Publication_Information:
	Publication_Place: Reston, VA
	Publisher: U.S. Geological Survey
  Description:
    Abstract: 
      This Digital Raster Graphic (DRG) was produced by 
      down sampling, georeferencing, and conversion of 
      a 1000 dots-per-inch (dpi) composite image of 
      revised map separates to a standard, USGS GeoTIFF 
      DRG. This DRG includes collar information and 
      is georeferenced to the UTM grid.
    Purpose:
      A DRG is useful as a source or background layer in
      a GIS, as a means to perform quality assurance on
      other digital products, and as a source for the
      collection and revision of  vector data. DRG's can
      also be merged with other digital data, for
      example, DEM's or DOQ's, to provide additional 
      visual information for the extraction and revision of 
      base cartographic information.
    Supplemental_Information:
      The Product ID is 902176.
      The UTM x,y position of pixel 1,1 is
	  746129.11,  4350545.49  
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
	Calendar_Date:  20020109
    Currentness_Reference: Ground Condition
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency:
      Irregular
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate:  -78.125
      East_Bounding_Coordinate:  -78
      North_Bounding_Coordinate:  39.25
      South_Bounding_Coordinate:  39.125
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: digital raster graphic
      Theme_Keyword: DRG
      Theme_Keyword: new version DRG
    Place:
      Place_Keyword_Thesaurus:
	U.S. Department of Commerce, 1995, Countries,
	dependencies, areas of special sovereignty,
	and their principal administrative divisions
	(Federal Information Processing Standard 10-4):
	Washington, D.C., National Institute of Standards
	and Technology.
      Place_Keyword:  US
    Place:
      Place_Keyword_Thesaurus:
	Department of Commerce, 1987, Codes for the
	identification of the States,  the District of
	Columbia and the outlying  areas of  the United
	States, and associated  areas (Federal Information
	Processing Standard 5-2): Washington, D.C., National
	Institute of Standards and Technology.
      Place_Keyword:  VA
      Place_Keyword:  WV
      Place_Keyword:  
      Place_Keyword:  
  Access_Constraints: None
  Use_Constraints:
    Acknowledgment of the U.S. Geological Survey would
    be appreciated for products derived from these
    data.
  Data_Set_Credit:
    This DRG was produced by the U.S. Geological
    Survey. Please refer to the map collar in the image
    for cooperative agencies.
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report:
      The DRG is an 8-bit color image. Colors in the DRG reflect
      the visual appearance of the map.  Specific RGB values may
      be used for uniform portrayal of features throughout a
      particular DRG series.  
  Logical_Consistency_Report: Not applicable
  Completeness_Report:
    The DRG is a faithfully reproduced digital image
    of the revised source. Data completeness for DRG
    files reflects content of the digitally revised source.
    Features may have been eliminated or generalized
    during digital revision due to scale and
    legibility constraints. For information on
    collection and inclusion criteria, see Standards for 
    1:24,000-Scale Digital Line Graphs and Quadrangle Maps, 
    Parts 1-4, 6-7, and 9-10, National Mapping Program
    Technical Instructions, U.S. Geological Survey, 2001; 
    Standards for 1:24,000-Scale Digital Line Graphs and 
    Quadrangle Maps, Part 5 and Part 8, National Mapping Program 
    Technical Instructions, U.S. Geological Survey, 1996;
    Standards for Digital Line Graphs, National Mapping Program 
    Technical Instructions, U.S. Geological Survey, 1999; and 
    Standards for Revised Primary Series Quadrangle Maps, 
    National Mapping Program Technical Instructions U.S. 
    Geological Survey, 2001. 
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report:
	Although the datum of the source is retained, in
	order to be consistent with other USGS digital
	data, this image is cast on the UTM and may
	therefore be INCONSISTENT with the credit note on
	the image collar. DRG's meet the accuracy
	standards of the revised digital source
	only in the area of the DRG that falls within the
	neatline of the image, excluding insets. Overedge
	areas fall outside the transformation boundary
	area (map neatline). As a result, areas outside
	the neatline and beyond the control point extent
	can exhibit anomalies or discrepancies. These
	anomalies will also appear in the map inset area
	and in the map collar.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Refer to the
	DRG collar for information about vertical positional accuracy.
  Lineage:
    Source_Information:
      Source_Citation:
	Citation_Information:
	  Originator: U.S. Geological Survey
	  Publication_Date:  2001
	  Title:  Stephenson, VA-WV
	  Geospatial_Data_Presentation_Form: 
	    composite raster image of revised map separates
	  Publication_Information:
	    Publication_Place: Reston, VA
	    Publisher: U.S. Geological Survey
      Source_Scale_Denominator:  24000
      Type_of_Source_Media: digital raster
      Source_Time_Period_of_Content:
	Time_Period_Information:
	  Single_Date/Time:
	    Calendar_Date:  1997
	Source_Currentness_Reference: Ground Condition
	Source_Citation_Abbreviation: RRI1
      Source_Contribution:
	Content and position
    Process_Step:
      Process_Description:
	The production procedures, instrumentation,
	hardware, and software used in the collection of
	new version DRG's may vary depending on systems
	used at the contract, cooperator or U.S. Geological
	Survey production site. The process step describes,
	in general, the methods used at a typical USGS 
	production site to produce DRG's derived from high
	resolution, composite raster images of digitally
	revised map separates.
  
	A de-screened, standard color palette, 8-bit, 1000 
	dpi, PackBits compressed Tagged Image File Format 
	(TIFF) raster image of composite map separates is 
	generated during the final stage of digital map revision.

	1. The TIFF is usually re-sampled to create a 500 dpi TIFF
	file.  Pixel resolution is a function of map scale.

	2. The TIFF is georeferenced using coordinates of the map
	graticule ticks.  Each tick is visited and assigned its 
	respective coordinates which are stored in a ground control 
	file.  Geographic transformation software is then 
	used to produce a georeferenced TIFF.

	3. The TIFF image is converted to a GEOTIFF DRG.

	4. Prior to archiving, the DRG undergoes the following
	quality assurance procedures: 

	a. The color index values of each DRG are checked 
	to ensure that the RGB combinations are consistent 
	with the standardized color model 1 palette. 
 
	b. All DRG files are inspected to ensure that they 
	are geometrically consistent with normal map presentation.
  
	c. Each DRG is checked to ensure that data elements 
	in the DRG metadata file correspond to the map collar 
	information and to the information in the associated 
	image file.

	d. Each DRG is checked for georeferencing accuracy
	by comparing  the book value of latitude and
	longitude tick marks with corresponding tick
	intersections in the DRG image.  

	e. GeoTIFF header records in each DRG are checked for 
	completeness and accuracy.

	Current USGS DRG Standards, including product specifications 
	are available via the World Wide Web at:

	http://mapping.usgs.gov/standards  

	DRG Standards and specifications can also be obtained 
	from any of the regional USGS Earth Science Information
	Center (ESIC) offices or by telephone request at
	1 888 ASK USGS

      Process_Date:  20020109
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count:  15382
    Column_Count:  12479
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
	Grid_Coordinate_System_Name: Universal Transverse Mercator
	Universal_Transverse_Mercator:
	  UTM_Zone_Number:  17
	  Transverse_Mercator:
	    Scale_Factor_at_Central_Meridian: .9996
	    Longitude_of_Central_Meridian:  -81.000
	    Latitude_of_Projection_Origin: 0.0
	    False_Easting: 500000.0
	    False_Northing: 0.0
      Planar_Coordinate_Information:
	Planar_Coordinate_Encoding_Method: row and column
	Coordinate_Representation:
	  Abscissa_Resolution:  1.21920
	  Ordinate_Resolution:  1.21920
	Planar_Distance_Units: Meters
    Geodetic_Model:
      Horizontal_Datum_Name:  North American Datum 1983
      Ellipsoid_Name:  GRS 1980
      Semi-major_Axis:  6378137
      Denominator_of_Flattening_Ratio:  298.257
Entity_and_Attribute_Information:
  Overview_Description:
    Entity_and_Attribute_Overview:
      Revised DRG Standards, of May 2001, allow up to 256
      non-standard colors. The majority of DRG's in the Sales
      Database were produced according to the original April
      1996 DRG Standards. Each raster entity or pixel, of a
      DRG produced with the old Standards or color model 1 of 
      the new Standards, contains a color index from 0 through
      12.  These indexes reference a color palette of RGB values
      from 0 through 255 in which the standard colors used in 
      the DRG are defined as below:

		  ----------------------------------------
		  USGS DRG Color Palette for Color Model 1
		  ----------------------------------------

       Digital Number    Color       Red     Green    Blue
       0                 Black        0        0        0
       1                 White        255      255      255
       2                 Blue         0        151      164
       3                 Red          203      0        23
       4                 Brown        131      66       37
       5                 Green        201      234      157
       6                 Purple       137      51       128
       7                 Yellow       255      234      0
       8                 Light Blue   167      226      226
       9                 Light Red    255      184      184
       10                Light Purple 218      179      214
       11                Light Grey   209      209      209
       12                Light Brown  207      164      142
       
    Entity_and_Attribute_Detail_Citation:
      Revised Standards for Digital Raster Graphics, U.S. Geological
      Survey, National Mapping Program Technical Instructions,
      Reston, VA, 2001.
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
	Contact_Organization:
	  Earth Science Information Center, U.S. Geological Survey
      Contact_Address:
	Address_Type: mailing address
	Address: 507 National Center
	City: Reston
	State_or_Province: VA
	Postal_Code: 20192
      Contact_Voice_Telephone: 1 888 ASK USGS
      Contact_Voice_Telephone: 1 888 275 8747
      Contact_TDD/TTY_Telephone: 1 703 648 4119 
      Contact_Facsimile_Telephone: 1 703 648 5548 (24 hours)
      Contact_Electronic_Mail_Address: ask@usgs.gov
      Hours_of_Service: 0800-1600 CT Monday through Friday
      Contact_Instructions:
	  In addition to the ESIC at the address above, there are other
        ESIC offices throughout the country. A full list of these 
        offices is at: http://ask.usgs.gov/esic/
  Resource_Description: DRG
  Distribution_Liability:
    Although these data have been processed successfully on a computer
    system at the USGS, no warranty expressed or implied is made by the
    USGS regarding the use of the data on any other system, nor does the
    act of distribution constitute any such warranty. The U.S. Geological
    Survey will warrant the delivery of this product in computer-readable 
    format and will offer appropriate adjustment of credit when the product
    is determined unreadable by correctly adjusted computer input peripherals, 
    or when the physical medium is delivered in damaged condition.  Requests 
    for adjustment of credit must be made within 90 days from the date of 
    this shipment from the ordering site.

  Standard_Order_Process:
    Digital_Form:
      Digital_Transfer_Information:
	  Format_Name: TIFF, GeoTIFF
	  Format_Version_Number: 6.0, 1.0
	  File_Decompression_Technique: PackBit
      Digital_Transfer_Option:
	Offline_Option:
	   Offline_Media: Compact Disc-Recordable (CD-R)
	   Recording_Format:
	    ISO 9660; DRG image files with corresponding world
	    files and metadata files.
    Fees:
      Cost of DRG's distributed on CD-R are subject to change.
      Call 1 888 ASK USGS for current prices.

    Ordering_Instructions:
      For information about ordering DRG's on CD-R, contact any Earth Science
      Information Center office at 1 888 ASK USGS, or visit Earth Explorer at
      http://earthexplorer.usgs.gov
Metadata_Reference_Information:
  Metadata_Date:  20020109
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
	  Contact_Organization:
	    Earth Science Information Center, U.S. Geological Survey
      Contact_Address:
	  Address_Type: Mailing Address
	  Address: 1400 Independence Road
	  City: Rolla
	  State_or_Province: MO
	  Postal_Code: 65401
      Contact_Voice_Telephone: 573 308 3500
      Contact_TDD/TTY_Telephone: 573 341 2716
      Contact_Facsimile_Telephone: 573 308 3615
      Contact_Electronic_Mail_Address: mcmcesic@usgs.gov
  Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
