## Montana State Library
GIS Data Dictionary
Metadata for Greater Yellowstone Area, Montana Roads from 1:24,000 scale U.S.G.S quadrangles
Table of Contents

Identification Information
Data Quality Information
Spatial Data Organization Information
Spatial Reference Information
Entity and Attribute Information
Distribution Information
Metadata Reference Information
Full FGDC-compliant Metadata

### Browse Graphic

### Identification_Information:

      Citation
        Originator:        Montana State Library
        Publication_Date:  1/30/2002
        Title:             Greater Yellowstone Area, Montana Roads from 1:24,000 scale U.S.G.S quadrangles
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/e00/dlgrd1.zip
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/shape/dlgrd1.zip
      Description
        Abstract:
            Roads from 1:24,000 scale U.S. Geological Survey quad-
            rangles, Greater Yellowstone Area, Montana.  The quadrangles have
            been joined into a single data set, but have not been edgematched.
            The USGS major and minor attribute codes have been replaced with
            the codes shown in this metadata record.
            See http://nris.mt.gov/nsdi/nris/dlg1.dbf for dates of
            the source quadrangles.
        Purpose:
            Base map data.
      Time_Period_of_Content
        Beginning_Date:  1948
        Ending_Date:     1996
      Access_Constraints:
            None
      Use_Constraints:
            Not for use at scales greater than 1:24000.
      Native_Data_Set_Environment:
          Arc/Info coverage or ESRI Shapefile

### Data_Quality_Information:

      Attribute_Accuracy_Report:
            Attributes were interpreted from the original DLG files by
            a computer program.  The accuracy of this interpretation
            has not been extensively checked.  Attribute accuracy of the
            original Digital Line Graph data is estimated by the USGS
            at 98.5 percent, and was tested by them as follows:
            - manual comparison of the source with hard copy plots.
            - symbolized display of the digital line graph on an
            interactive compter graphic system.
            - Selected attributes that could not be visually verified on
            plots or on screen, were interactively queried and verified
            on screen.
            In addition, U.S. Geological Survey  (USGS) Production
            System (PROSYS) software tested the attributes against a
            master set of valid attributes for the category; it also
            checked for selected valid attribute combinations, and for
            valid attributes relative to topology and dimensionality.
            All attribute data conform to the attribute codes current
            as of the date of digitizing.
      Completeness_Report:
            For DLG data, Digital Revision Status = Not revised:
            Data completeness reflects the content of the source
            quadrangle.  Features may have been eliminated or
            generalized on the source graphic, due to scale and
            legibility constraints.
            For DLG data, Digital Revision Status = Limited Update:
            This file has undergone limited update digital revision.
            The file contains only (1) those features that are
            photoidentifiable on monoscopic source, supplemented with
            limited ancillary source, and (2) those features, present on
            the original source quadrangle, that can not be reliably
            photoidentified but that are not considered particularly
            prone to change.
            For DLG data, Digital Revision Status = Standard Update:
            This file has undergone standard update digital revision.
            The data completeness of this file meets National Mapping
            Division standards for feature content.
      Horizontal_Positional_Accuracy_Report:
            Approximate accuracy is 12 meters, assuming the source maps
            meet National Map Accuracy Standards (NMAS).  NMAS
            horizontal accuracy requires that at least 90 percent of
            points tested are within 0.02 inches of the true position.
            The digital data are estimated to contain a horizontal
            positional error of less than or equal to 0.003 inches
            standard error in the two component directions relative to
            the source quadrangle.  Comparison to the graphic source is
            used as control to assess digital positional accuracy.
            Cartographic offsets may be present on the graphic source,
            due to scale and legibility constraints.  Digital map
            elements require edge alignment between data sets.  Data
            along each quadrangle edge are tested against the data set
            for the adjacent quadrangle using PROSYS; tests check for
            positional accuracy between data sets within a 0.02 inches
            tolerance.  Features with like dimensionality, and with or
            without like attribution, that are within the tolerance
            are adjusted by moving the feature equally in both data
            sets.  Features outside the tolerance are not moved.
      Lineage
        Source_Information
          Originator:  National Mapping Division
                       U.S. Geological Survey
          Publication_Date:  2001
          Title:  1:24,000-scale Digital Line Graphs
          Publication_Information
            Publication_Place:  Reston, VA
            Publisher:  U.S. Geological Survey
          Other_Citation_Details:
            See http://nris.mt.gov/nsdi/nris/dlg1.dbf for publication
            dates of the various quadrangles.
          Source_Scale_Denominator:  24000
          Type_of_Source_Media:  unknown
          Source_Time_Period_of_Content
            Beginning_Date:  1948
            Ending_Date:     1996
          Source_Citation_Abbreviation:  Q7.5
          Source_Contribution:
              The data set is a re-processed copy of this source.
      Process_Step
        Process_Description:
          Interpret USGS attributes, project quadrangles to State Plane
          Coordinates, and join quadrangles into one data set.
          The procedures used to do this are shown in the Arc/Info AML
          programs at http://nris.mt.gov/nsdi/nris/dlgaml1.zip.
        Source_Used_Citation_Abbreviation:  Q7.5
        Process_Date:  1/30/2002
        Source_Produced_Citation_Abbreviation:  fin1

### Spatial_Data_Organization_Information:

      Direct_Spatial_Reference_Method:  Vector
      Point_and_Vector_Object_Information
        Number of Arcs:  27579
        Number of Nodes: 24989

### Spatial_Reference_Information:

      Horizontal_Coordinate_System_Definition
        Grid_Coordinate_System_Name:  State Plane Coordinate System 1983
          SPCS_Zone_Identifier:  2500
          Map_Projection_Name:  Lambert Conformal Conic
          Standard_Parallel:  45
          Standard_Parallel:  49
          Longitude_of_Central_Meridian:  -109.5
          Latitude_of_Projection_Origin:  44.25
          False_Easting:   600000
          False_Northing:  0
        Planar_Distance_Units:  meters
        Geodetic_Model
          Horizontal_Datum_Name:  North American Datum of 1983
        Altitude_Encoding_Method:  Implicit coordinate

### Entity_and_Attribute_Information:

      Entity_Type_Definition:  Arc Attribute Table
        Attribute_Label:  CODE
          Attribute_Definition:  Road type code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            50                      Interchange
            51                      Interchange, Underpassing
            61                      Cul-de-sac
            100                     Class 1 Road
            102                     Class 1 Road, Overpassing
            103                     Class 1 Road, Underpassing
            110                     Divided Class 1 Road
            112                     Divided Class 1 Road, Overpassing
            113                     Divided Class 1 Road, Underpassing
            120                     Separated Class 1 Road
            122                     Separated Class 1 Road, Overpassing
            123                     Separated Class 1 Road, Underpassing
            130                     One-Way Class 1 Road
            200                     Class 2 Road
            202                     Class 2 Road, Overpassing
            203                     Class 2 Road, Underpassing
            220                     Separated Class 2 Road
            300                     Class 3 Road
            302                     Class 3 Road, Overpassing
            303                     Class 3 Road, Underpassing
            304                     Class 3 Road, Arbitrary Closure
            310                     Divided Class 3 Road
            312                     Divided Class 3 Road, Overpassing
            313                     Divided Class 3 Road, Underpassing
            320                     Separated Class 3 Road
            340                     Traffic Circle, Class 3
            360                     Rest Area
            400                     Class 4 Road
            401                     Class 4 Road in Tunnel
            402                     Class 4 Road, Overpassing
            403                     Class 4 Road, Underpassing
            408                     Class 4 Road, Privately operated or controlled public access
            409                     Class 4 Road, Submerged or in ford
            500                     Trail
            509                     Trail, Submerged or in ford
            570                     Old Railroad Grade
            571                     Old Railroad Grade in Tunnel
            580                     Class 5 Road, Four-Wheel Drive Trail
            588                     Class 5 Road, Four-Wheel Drive Trail, Privately operated or controlled public access
            601                     Footbridge
            602                     Non-Standard Road
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1946

        Attribute_Label:  ROUTE
          Attribute_Definition:  List of route names
              This attribute was based on USGS attribute codes and has
              been updated at the State Library.  For example, an arc that
              carries Interstate 90, U.S. 12, and Montana 43 would have
              "I90 US12 S43" as its ROUTE attribute.  Route
              numbers that start with an "L" are park, forest,
              reservation, or military routes.
            Unrepresentable_Domain:  Character field
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    2001

        Attribute_Label:  RVIS
          Attribute_Definition:  Photorevision code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            0                       Not photorevised
            1                       Photorevised
            2                       Estimated location or attributes
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

        Attribute_Label:  OTHR
          Attribute_Definition:  Co-incident feature type code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            B                       Boundary
            H                       Hydrography
            M                       Man-made feature
            T                       Miscellaneous Transportation
            U                       U.S. Public Land Survey line
            X                       Unknown
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

        Attribute_Label:  LANE
          Attribute_Definition:  Number of Traffic Lanes
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            Any number              Number of traffic lanes
            T                       Transition area
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

        Attribute_Label:  WDTH
          Attribute_Definition:  Roadway Width code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            A                       46-55 feet
            B                       56-65 feet
            C                       66-75 feet
            D                       76-85 feet
            E                       86-95 feet
            F                       69-105 feet
            G                       106-115 feet
            H                       116-125 feet
            I                       126-135 feet
            J                       136-145 feet
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

      Entity_Type_Definition:  Node Attribute Table
        Attribute_Label:  CODE
          Attribute_Definition:  Road node type code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            1                       Bridge Abutment
            2                       Tunnel Portal
            4                       Gate
            5                       Cul-de-sac
            6                       Dead end
            11                      Bridge Abutment-Photorevised
            606                     Submerged or in ford
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

### Distribution_Information:

### Metadata_Reference_Information:

      Metadata_Date:  01/30/2002
      Metadata_Contact:  Gerry Daumiller