Geologic Map Database of the Washington DC Area Featuring Data From Three 30 X 60 Minute Quadrangles: Frederick, Washington West, and Fredericksburg

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Adam M. Davis
Originator: C. Scott Southworth
Originator: J. Stephen Schindler
Originator: James E. Reddy
Publication_Date: 2001
Title:

Geologic Map Database of the Washington DC Area Featuring Data From Three 30 X 60 Minute Quadrangles: Frederick, Washington West, and Fredericksburg

Edition: 1.0
Geospatial_Data_Presentation_Form: Tabular digital data and map
Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 01-227

Publication_Information:

Publication_Place: Reston, Virginia
Publisher: U.S. Geological Survey

Online_Linkage: http://pubs.usgs.gov/of/2001/of01-227/

Description:

Abstract:

The Washington DC Area geologic map database (DCDB) provides geologic map information of areas to the NW, W, and SW of Washington, DC to various professionals and private citizens who have uses for geologic data. Digital, geographically referenced, geologic data is more versatile than traditional hard copy maps, and facilitates the examination of relationships between numerous aspects of the geology and other types of data such as: land-use data, vegetation characteristics, surface water flow and chemistry, and various types of remotely sensed images. The DCDB was created by combining Arc/Info coverages, designing a Microsoft (MS) Access database, and populating this database. Proposed improvements to the DCDB include the addition of more geochemical, structural, and hydrologic data.

Purpose:

Geology was researched and compiled for use in studies of ecosystem health, environmental impact, soils, groundwater, land use, tectonics, crustal genesis, sedimentary provenance, and any others that could benefit from geographically referenced geological data.

Supplemental_Information:

Data are provided in several common GIS formats and MS Access database files. The geologic data themes included are bedrock, surficial, faults and fold axes, neat line, structural data, and sinkholes; the base themes are political boundaries, roads, elevation contours, and hydrography.
Data were originally collected in UTM coordinates, zone 18, NAD 1927, and projected to geographic coordinates (Lat/Long), NAD 1983. The data base is accompanied by large format color maps, a readme.txt file, and a explanatory PDF pamphlet.

Data_Set_Structure:
Data_Set_Part:
Part_Type: Arc/Info coverages, INFO tables, and their export-interchange file equivalents (files with *.e00 extensions)
Part_Name: Geologic map data
Part_Description: These coverages and INFO tables provide the scientific content of the mapped data
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: BEDROCK
Part_Description: Polygon coverage for the contacts of bedrock geologic map units
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: FAULT
Part_Description: Line coverage for the geologic faults and folds
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: NEAT
Part_Description: Line coverage of the map neatline
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: SINK
Part_Description: Point coverage of sinkhole locations
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: STRUCTURE
Part_Description: Point coverage of geologic structure
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: SURFICIAL
Part_Description: Polygon coverage for the contacts of surficial geologic map units
Data_Set_Part:
Part_Type: Arc/Info coverages and their export-interchange file equivalents (files with *.e00 extensions)
Part_Name: Base map data
Part_Description: These coverages provide the base map to which the geologic information is geographically registered
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: POLBND
Part_Description: Polygon coverage of state and county boundaries
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: ROADS
Part_Description: Line coverage of major highways
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: TOPO
Part_Description: Line coverage of elevation contours
Data_Set_Part:
Part_Type: Arc/Info coverage
Part_Name: HYDRO
Part_Description: Polygon coverage of major water bodies
Data_Set_Part:
Part_Type: ArcView shapefiles (*.dbf, *.shp, *.shx) and related DBF tables
Part_Name: Geologic map data
Part_Description: These shapefiles and DBF tables provide the scientific content of the mapped data
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: BEDROCK.*
Part_Description: Shapefiles for the contacts of bedrock geologic map units
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: FAULT.*
Part_Description: Shapefiles for the geologic faults and folds
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: NEAT.*
Part_Description: Shapefiles for the map neatline
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: SINK.*
Part_Description: Shapefiles for sinkhole locations
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: STRUCTURE.*
Part_Description: Shapefiles for geologic structure
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: SURFICIAL.*
Part_Description: Shapefiles for the contacts of surficial geologic map units
Data_Set_Part:
Part_Type: ArcView shapefile (*.dbf, *.shp, *.shx)
Part_Name: Base map data
Part_Description: These shapefiles provide the base map to which the geologic information is geographically registered
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: POLBND.*
Part_Description: Shapefiles for state and county boundaries
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: ROADS.*
Part_Description: Shapefiles for major highways
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: TOPO.*
Part_Description: Shapefiles for elevation contours
Data_Set_Part:
Part_Type: ArcView shapefile
Part_Name: HYDRO.*
Part_Description: Shapefiles for major water bodies
Data_Set_Part:
Part_Type: Spatial Data Transfer Standard (SDTS) data exchange files
Part_Name: Geologic map data
Part_Description: These SDTS files provide the scientific content of the mapped data
Data_Set_Part:
Part_Type: SDTS files
Part_Name: BEDR*.*
Part_Description: SDTS files for the contacts of bedrock geologic map units
Data_Set_Part:
Part_Type: SDTS files
Part_Name: FAUL*.*
Part_Description: SDTS files for the geologic faults and folds
Data_Set_Part:
Part_Type: SDTS files
Part_Name: NEAT*.*
Part_Description: SDTS files for the map neatline
Data_Set_Part:
Part_Type: SDTS files
Part_Name: SINK*.*
Part_Description: SDTS files for sinkhole locations
Data_Set_Part:
Part_Type: SDTS files
Part_Name: STRU*.*
Part_Description: SDTS files for the geologic structure
Data_Set_Part:
Part_Type: SDTS files
Part_Name: SURF*.*
Part_Description: SDTS files for the contacts of surficial geologic map units
Data_Set_Part:
Part_Type: Spatial Data Transfer Standard (SDTS) data exchange files
Part_Name: Base map data
Part_Description: These SDTS files provide the base map to which the geologic information is geographically registered
Data_Set_Part:
Part_Type: SDTS files
Part_Name: POLB*.*
Part_Description: SDTS files for state and county boundaries
Data_Set_Part:
Part_Type: SDTS files
Part_Name: ROAD*.*
Part_Description: SDTS files for major highways
Data_Set_Part:
Part_Type: SDTS files
Part_Name: TOPO*.*
Part_Description: SDTS files for elevation contours
Data_Set_Part:
Part_Type: SDTS files
Part_Name: HYDR*.*
Part_Description: SDTS files for major water bodies
Data_Set_Part:
Part_Type: Microsoft Access databases and their ASCII text file equivalents (files in the 'text_tables' folder with *.txt extensions)
Part_Name: Geologic database
Part_Description: These databases contain attribute information that can be used as supplements to the GIS layers
Data_Set_Part:
Part_Type: Microsoft Access database
Part_Name: DCDB_EESP.MDB
Part_Description: Database designed by the Eastern Region's Earth Surface Processes Team (EESPT) of the U.S. Geological Survey
Data_Set_Part:
Part_Type: Microsoft Access database
Part_Name: DCDB_DM.MDB
Part_Description: Database resulting from the conversion of the DCDB_EESP.MDB database to a format compatible with the North American Data Model Standard for Geologic Map Data Version 4.3 (NADM) of Johnson et al. (1988)
Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1988
Ending_Date: 2001

Currentness_Reference: Publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -78.00
East_Bounding_Coordinate: -77.00
North_Bounding_Coordinate: 39.50
South_Bounding_Coordinate: 38.00

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geologic maps
Theme_Keyword: bedrock geologic units
Theme_Keyword: surficial geologic units
Theme_Keyword: faulting (geologic)
Theme_Keyword: geologic structure
Theme_Keyword: geospatial datasets

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus: none
Place_Keyword: Frederick
Place_Keyword: Maryland
Place_Keyword: Washington
Place_Keyword: DC
Place_Keyword: Fredericksburg
Place_Keyword: Virginia
Place_Keyword: West Virginia

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: US11 = District of Columbia
Place_Keyword: f24013 = Carroll
Place_Keyword: f24021 = Frederick
Place_Keyword: f24027 = Howard
Place_Keyword: f24031 = Montgomery
Place_Keyword: f24043 = Washington
Place_Keyword: f51043 = Clarke
Place_Keyword: f51059 = Fairfax
Place_Keyword: f51061 = Fauquier
Place_Keyword: f51107 = Loudoun
Place_Keyword: f54003 = Berkeley
Place_Keyword: f54037 = Jefferson
Place_Keyword: f24017 = Charles
Place_Keyword: f24033 = Prince George's
Place_Keyword: f51013 = Arlington
Place_Keyword: f51047 = Culpeper
Place_Keyword: f51153 = Prince William
Place_Keyword: f51157 = Rappahannock
Place_Keyword: f51179 = Stafford
Place_Keyword: f51033 = Caroline
Place_Keyword: f51057 = Essex
Place_Keyword: f51085 = Hanover
Place_Keyword: f51099 = King George
Place_Keyword: f51109 = Louisa
Place_Keyword: f51137 = Orange
Place_Keyword: f51177 = Spotsylvania
Place_Keyword: f51193 = Westmoreland

Access_Constraints: None
Use_Constraints:

Although all data released in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: C. Scott Southworth
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: Mailing address
Address: National Center, MS926A
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: USA

Contact_Voice_Telephone: 703-648-6385
Contact_Facsimile_Telephone: 703-648-6953
Contact_Electronic_Mail_Address: ssouthwo@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2001/of01-227/01227p1p.gif
Browse_Graphic_File_Description:

Reduced-size image showing the general layout of map sheet. 640x864 pixels, 24-bit color.

Browse_Graphic_File_Type: GIF

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2001/of01-227/01227p2p.gif
Browse_Graphic_File_Description:

Reduced-size image showing the general layout of map sheet. 640x864 pixels, 24-bit color.

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Logical_Consistency_Report: Polygon and chain-node topology present
Completeness_Report:

DCDB Version 1.0 - subsequent versions may contain more data and/or a greater diversity of data types.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Mixon, R.B.
Originator: Pavlides, Louis
Originator: Powars, D.S.
Originator: Froelich, A.J.
Originator: Weems, R.E.
Originator: Schindler, J.S.
Originator: Newell, W.L.
Originator: Edwards, L.E.
Originator: Ward, L.W.
Title:

Geologic map of the Fredericksburg 30' X 60' quadrangle, Virginia and Maryland

Publication_Date: 2000
Series_Information:

Series_Name: U.S. Geological Survey, Geologic Investigations Series Map
Issue_Identification: I-2607

Other_Citation_Details:

Source_Scale_Denominator: 100000
Type_of_Source_Media: paper
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2000

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Mixon and others (2000)
Source_Contribution:

These geologic data were compiled at the scale 1:100,000 from a series of detailed published and unpublished field investigations at scales ranging from 1:24000 to 1:100000.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Lyttle, P.T.
Originator: Aleinikoff, J.N.
Originator: Drake, A.A., Jr.
Originator: Froelich, A.J.
Originator: Horton, J.W., Jr.
Originator: Kasselas, G.
Originator: McCartan, L.
Originator: Mixon, R.B.
Originator: Nelson, A.E.
Originator: Pavlides, L.
Originator: Weems, R.E.
Title:

Geologic Map of the Washington West 30' X 60' Quadrangle, District of Columbia, Virginia, Maryland

Publication_Date: in press
Series_Information:

Series_Name: U.S. Geological Survey Geologic Investigations Series Map

Type_of_Source_Media: mylar
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: in press

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Lyttle and others (in press)
Source_Contribution:

These geologic data were compiled at the scale 1:100,000 from a series of detailed published and unpublished field investigations at scales ranging from 1:24000 to 1:100000.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Southworth, S.
Originator: Brezinski, D.K.
Originator: Drake, A.A.,Jr.
Originator: Burton, W.C.
Originator: Orndorff, R.C.
Originator: Froelich, A.J.
Originator: Reddy, J.
Originator: Daniels, D.L.
Title:

Geologic Map of the Frederick 30' x 60' Quadrangle, Maryland and Virginia

Publication_Date: in press
Series_Information:

Series_Name: U.S. Geological Survey Geologic Investigations Series Map

Type_of_Source_Media: mylar
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: in press

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Southworth and others (in press)
Source_Contribution:

These geologic data were compiled at the scale 1:100,000 from a series of detailed published and unpublished field investigations at scales ranging from 1:24000 to 1:100000.

Process_Step:

Process_Description:

The geologic map data was digitized from mylar scribe sheets used to prepare the published or in press Geologic Maps of the Fredericksburg (Mixon and others, 2000), Washington West (Lyttle and others, in press), and Frederick (Southworth and others, in press) 30 X 60 Minute Quadrangles at a map scale of 1:100,000. Mylar scribe sheets were scannned, vectorized and then imported into Arc/Info software. Frederick and Washington West were digitized by the Eastern Earth Surface Processes Team of the U.S. Geological Survey. Fredericksburg was digitized by Geologic Data Systems, Inc., 1600 Emerson Street, Denver, CO 80218

Process_Date: 1999

Process_Step:

Process_Description:

Polygons, lines, and points for each of the three 30 X 60 minute quadrangles were combined into a single polygon coverage (i.e., bedrock and surficial map units), a single line coverage (i.e., faults and fold axes) and two point coverages (sinkholes and structural measurements). This process involved edgematching of linework and making the map unit symbols uniform across quadrangle boundaries.

Process_Date: 19991221

Process_Step:

Process_Description:

Surficial geology polygons were separated from the bedrock map units into a surficial polygon coverage. The result is two map unit coverages: one that contains bedrock geology units and one that contains surficial geology units.

Process_Date: 20001031

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.001
Longitude_Resolution: 0.001
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:

Overview_Description:

Entity_and_Attribute_Overview:

The following is a brief description of the data layers, tables, and their associated
attributes that are used in this report.

GEOLOGIC DATA:
BEDROCK - Polygon data layer of bedrock geologic map units
  BEDROCK.PAT items:
    MAPUNIT - Bedrock geologic map unit code
    COA_ID - Compound object archive identifier, map unit names and descriptions -
             a data linkage hub in North American Data Model (NADM) 4.3

FAULT - Line data layer of geologic faults and folds
  FAULT.AAT items:
    SYMBOL - Symbol number from FAULT.LIN or ALCNEW61.LIN linesets, used for plotting
    SYMBOL-ARC - Symbol number from GDS1.LIN lineset, used for plotting
    FEATURE - Geologic Data Systems (GDS) assigned feature description
    ELEVATION - GDS assigned attribute
    TYPE - Type of fault
      TYPE Code  Description
         AC      Anticline
         AF      Antiform
        ARO      Arrow showing movement along strike-slip fault
         FZ      Fault zone
          N      Normal fault
         NT      Normal fault re-activated as thrust fault
         OT      Overturned thrust fault
         SC      Syncline
         SF      Synform
         SS      Strike-slip fault
          T      Thrust fault
         TA      Thermal aureole
         UF      Unclassified fault
        ULF      Unclassified linear feature
    CODE - Identifies fault segments which are overlaid by surficial deposits
           (CODE = 2).  Used for plotting.  Relevant only for those faults which
           lie within the boundary of the USGS Frederick 1:100000-scale map.
    QUAD - Identifies the USGS 1:100000-scale map to which the feature belongs
      QUAD
      Code  Description
       FB - Fredericksburg
       FK - Frederick
       WW - Washington West

NEAT - Line data layer of map neatline

SINK - Point data layer of sinkhole locations
  SINK.PAT items:
    MAPUNIT - Set to 'Sinkhole'

STRUCTURE - Point data layer of geologic structure
  STRUCTURE.PAT items:
    DIP - Dip value (planar data) or plunge value (linear data)
    STRIKE_ANG - GDS assigned angle measured from North
    AZIMUTH - Angle measured from North in right-hand rule (planar data).
              Routines used to digitize the geologic structure symbols that
              lie within the boundaries of the USGS Frederick and Washington
              West 1:100000-scale maps (item QUAD equal to 'FK' and 'WW',
              respectively) resulted in the azimuth value for those symbols to
              be calculated based on a northern trend (270<=azimuth<=90).
              Southern trending azimuth values (90<azimuth<270) for structure
              symbols associated with the Frederick and Washington West maps
              were translated to their northern trend equivalents.  If necessary,
              the southern trending azimuth values for these symbols can be
              restored using the item SYMB_ANG and the following equations:
                For 180<SYMB_ANG<=270,
                  azimuth = AZIMUTH + 180
                For 270<SYMB_ANG<360,
                  azimuth = AZIMUTH - 180
    TYPE - Type of geologic structure.  Relevant for geologic structure data
           that lies within the boundaries of the USGS Frederick and Washington West
           1:100000-scale maps (item QUAD equal to 'FK' and 'WW')
      TYPE Code  Description
        AGE      Sample site for U-Pb isotopic technique for age date
         HB      Horizontal bed
        I1C      Inclined first-generation Paleozoic cleavage and (or) schistosity
        I2C      Inclined second-generation Paleozoic cleavage and (or) schistosity
        IEF      Inclined early foliation
         IB      Inclined bed
         IF      Inclined Middle Proterozoic foliation
        IMP      Inclined mylonitic and phyllonitic foliations
        IPF      Inclined phyllonitic foliation
         MA      Minor antiform
         OB      Overturned bed
         QM      Quarry or mine
        RAD      Greater than 200 pCi/L of soil gas radon
        V1C      Vertical first-generation Paleozoic cleavage and (or) schistosity
        V2C      Vertical second-generation Paleozoic cleavage and (or) schistosity
         VB      Vertical bed
        VEF      Vertical early foliation
         VF      Vertical Middle Proterozoic foliation
        VMP      Vertical mylonitic and phyllonitic foliations
    SUB_TYPE - Type of quarry mine
      SUB_TYPE
        Code    Description
         Ag     Silver
         Au     Gold
          C     Chromite
         Cu     Copper
          D     Diabase
          F     Hematite, limonite, and iron-ore
          L     Limestone
          M     Marble
         Mg     Magnetite
         Mn     Manganese
         Pb     Lead
          S     Building stone
         Sl     Slate
         Zn     Zinc
    SYMB_ANG - Standard Cartesian angle measured from East.  Used for plotting.
    DIPDIR - Direction of dip (planar data) or trend (linear data) measured from North
    SYMBOL - Symbol number from the LOUDOUN_AP.MRK markerset or the MPLY.LIN lineset,
             used for plotting
    FEATURE - Type of geologic structure.  Relevant for geologic structure data that
              lies within the boundary of the USGS Fredericksburg 1:100000-scale
              map (item QUAD equal to 'FB')
    GROUP - GDS assigned attribute
    METHOD - GDS assigned attribute
    SOURCE - GDS assigned attribute
    DIP_DIR - GDS assigned attribute
    SYMB_ARC - Symbol number from the GDS1.MRK markerset, used for plotting
    QUAD - Identifies the USGS 1:100000-scale map to which the structure data belongs
      QUAD
      Code  Description
       FB - Fredericksburg
       FK - Frederick
       WW - Washington West

SURFICIAL - - Polygon data layer of surficial geologic map units
  SURFICIAL.PAT items:
    MAPUNIT - Surficial geologic map unit code
    COA_ID - Compound object archive identifier, map unit names and descriptions -
             a data linkage hub in North American Data Model (NADM) 4.3

BASE DATA:
POLBND - Net data layer of state and county boundaries:
  POLBND.AAT items:
    POLBND-ID
      TYPE - State or county boundary
  POLBND.PAT items:
    STATE_NAME - State in which county resides
    CNTY_NAME - County name
    STATE_FIPS - State FIPS code (character field)
    CNTY_FIPS - County FIPS code (character field)
    FIPS - FIPS code for state/county (character field)
    MAJOR# - DLG code
    MINOR# - DLG code
      Major DLG  Minor DLG
        Code       Code     Description
         91        ---      State FIPS code (integer field)
         92        ---      County FIPS code (integer field)

ROADS - Line data layer of major highways
  ROADS.AAT items:
    MAJOR# - DLG code
    MINOR# - DLG code
      Major DLG  Minor DLG
        Code       Code     Description
        170        201      Primary route, class 1, undivided
        170        203      Primary route, class 1, divided
        170        204      Primary route, class 1, one way
        170        205      Secondary route, class 2, undivided
        170        207      Secondary route, class 2, divided
        170        209      Road or street, class 3
        170        210      Road or street, class 4
        170        401      Traffic circle
        170        402      Cloverleaf or interchange
        170        607      Underpassing
        170        617      Business route
        172        ---      Interstate route number
        173        ---      U.S. route number
        174        ---      State route number

TOPO - Line data layer of elevation contours
  TOPO.AAT items:
    MAJOR# - DLG code
    MINOR# - DLG code
      Major DLG  Minor DLG
        Code       Code     Description
         20        20O      Contour (index or intermediate)
         20        201      Carrying contour
         20        204      Amended contour
         20        208      Closure line
         20        611      Depression
         24        ---      Elevation in whole meters
    TYPE - Type of contour: index (Index) or intermediate (Inter),
           used for plotting

HYDRO - Polygon data layer of major water bodies
  HYDRO.PAT items:
    RINGS_OK - Attribute assigned by the Chesapeake Bay Program
    RINGS_NOK - Attribute assigned by the Chesapeake Bay Program
    FEATURE - Type of hydrologic feature (stream, pond, marsh, etc.)

Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/2001/of01-227/of01227.pdf

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: C. Scott Southworth
Contact_Address:

Address_Type: Mailing address
Address: National Center, MS926A
City: Reston
State_or_Province: Virginia
Postal_Code: 20192
Country: USA

Contact_Voice_Telephone: 703-648-6385
Contact_Facsimile_Telephone: 703-648-6953
Contact_Electronic_Mail_Address: ssouthwo@usgs.gov
Hours_of_Service: Monday - Friday 9:00 - 5:00 EST

Resource_Description: USGS Open-File Report 01-227
Distribution_Liability:

These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product or process disclosed in this report, and represents that its use would not infringe privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data or related materials. Reference therein to any specific commercial product, process, or related service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCE
Format_Version_Number: 8.0.2
Format_Information_Content:

Bedrock and surficial geologic map units, fault and fold axes, structural geology, political boundaries, elevation contours, and major highways and water bodies.

File_Decompression_Technique: WinZip, gzip and tar
Transfer_Size: 37.0

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/of/2001/of01-227/of01227.zip

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20160613
Metadata_Review_Date: 20020505
Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Position: James E. Reddy
Contact_Address:

Address_Type: Mailing address
Address: 30 Brown Road
City: Ithaca
State_or_Province: New York
Postal_Code: 14850
Country: USA

Contact_Voice_Telephone: 607-266-0217, x3014
Contact_Facsimile_Telephone: 607-266-0521
Contact_Electronic_Mail_Address: jreddy@usgs.gov
Hours_of_Service: Monday - Friday 9:00 - 5:00 EST

Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Extensions:

Online_Linkage: http://geology.usgs.gov/tools/metadata/tools/ext/parts.ext

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/01-227/metadata.html>