## Montana State Library
GIS Data Dictionary
Metadata for Greater Yellowstone Area, Wyoming and Idaho, Hydrography Arcs 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, Wyoming and Idaho, Hydrography Arcs from 1:24,000 scale U.S.G.S. quadrangles
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/e00/dlghd3.zip
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/shape/dlghd3.zip
      Description
        Abstract:
            Hydrography arcs and points from 1:24,000 scale U.S.
            Geological Survey quadrangles, Greater Yellowstone Area,
            Wyoming and Idaho, not including areas inside National
            Parks.  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.

            A few of the DLG files from USGS had coordinates in the NAD83
            datum, while most were in NAD27.  Because of the diffrence between
            the position of the quadrangle boundaries between NAD83 and NAD27,
            there are gaps in the data, generally about 200 meters wide, between
            adjacent quadrangles that have different datums.

            See http://nris.mt.gov/nsdi/nris/dlg2.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 coverages or ESRI shapefiles

### 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:
            The coverage only contains point and node attributes for the
            13 quadrangles that were imported in 1997.
            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/dlg2.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:   26896
        Number of Points: 159
        Number of Nodes:  25646

### 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:  Code for hydrography arc type
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            10                      Shoreline
            15                      Shoreline, Manmade
            20                      Shoreline, Intermittent
            110                     Stream
            120                     Stream, Intermittent
            128                     Stream, Intermittent, Underpassing
            130                     Stream, Rapids
            131                     Stream, Overpassing
            132                     Stream, Unserveyed
            133                     Stream, Intermittent, Overpassing
            134                     Stream, Underpassing
            160                     Left Bank
            170                     Right Bank
            210                     Ditch
            214                     Ditch, Underpassing
            222                     Ditch, Intermittent, Coincident USPLS
            224                     Ditch, Intermittent, Underpassing
            228                     Ditch, Overpassing
            229                     Ditch, Tunnel
            230                     Aqueduct
            232                     Aqueduct, Underground
            236                     Aqueduct, Underground, Underpassing
            240                     Flume
            253                     Siphon
            254                     Siphon, Underground
            430                     Dam or weir
            710                     Water-Water Closure
            821                     Rapids
            822                     Falls
            920                     Apparent Limit
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

        Attribute_Label:  RVIS
          Attribute_Definition:  Photorevision flag
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            0                       Feature is not photo-revised
            1                       Feature is photo-revised
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

      Entity_Type_Definition:  Point Attribute Table
        Attribute_Label:  CODE
          Attribute_Definition:  Hydrography point type code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
             55                     River Mile Marker
            300                     Spring
            301                     Spring, Mineral or Hot
            310                     Non-flowing well
            330                     Riser
            350                     Windmill
            403                     Gaging Station
            404                     Pumping Station
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

        Attribute_Label:  RIVMILE
          Attribute_Definition:  River Mile number
            Range_Domain
              Range_Domain_Minimum:  0
              Range_Domain_Maximum:  102
          Attribute_Units_of_Measure:  miles
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

      Entity_Type_Definition:  Node Attribute Table
        Attribute_Label:  CODE
          Attribute_Definition:  Hydrography node type code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            10                      Upper origin of stream
            11                      Upper origin of stream, spring
            14                      Non-flowing well, Upper origin of stream
            15                      Flowing well, Upper origin of stream
            16                      Gaging Station, Upper origin of stream
            20                      Upper origin of stream at water body
            21                      Upper origin of stream at water body, Spring
            30                      Sink, channel no longer evident
            40                      Stream entering water body
            50                      Stream exiting water body
            51                      Stream exiting water body, Riser
            300                     Spring
            301                     Non-flowing well
            314                     Lake or pond, intermittent, entering water body
            400                     Rapids
            401                     Falls
            403                     Gaging Station
            408                     Spillway
            421                     Lake or pond
          Beginning_Date_of_Attribute_Values:  1948
          Ending_Date_of_Attribute_Values:    1996

### Distribution_Information:

### Metadata_Reference_Information:

      Metadata_Date:  1/30/2002
      Metadata_Contact:  Gerry Daumiller