## Montana State Library
GIS Data Dictionary
Metadata for Upper Clark Fork Hydrography Polygons 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:  02/05/1992
        Title:             Upper Clark Fork Hydrography Polygons from 1:24,000 scale U.S.G.S. quadrangles
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/e00/hd32.zip
        Online_Linkage:  http://nris.mt.gov/nsdi/nris/shape/hd32.zip
      Description
        Abstract:
            Hydrography polygons from USGS 1:24,000 scale quadrangles,
            Upper Clark Fork Basin, Montana.  The quadrangles have been
            joined into a single data set, but have not been edgematched,
            except to perserve polygon topology.  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/cf7.dbf for dates of
            the source quadrangles.
        Purpose:
            Base map data.
      Time_Period_of_Content
        Beginning_Date:  01/01/1961
        Ending_Date:     01/01/1989
      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:
            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.
      Vertical_Positional_Accuracy_Report:
            Elevation of some polygons was read or estimated from the
            source quadrangles.  National Map Accuracy Standards
            require that 90 percent of the elevations be within half
            the contour interval of the source maps (contour interval is
            usually 20 or 40 feet).  For polygons with a value other
            than 0 for M619, the elevation is estimated.
      Lineage
        Source_Information
          Originator:  National Mapping Division
                       U.S. Geological Survey
          Publication_Date:  01/01/1961
          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/cf7.dbf for publication
            dates of the various quadrangles.
          Source_Scale_Denominator:  24000
          Type_of_Source_Media:  unknown
          Source_Time_Period_of_Content
            Beginning_Date:  01/01/1961
            Ending_Date:     01/01/1989
          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.
        Source_Used_Citation_Abbreviation:  Q7.5
        Process_Date:  02/05/1992
        Source_Produced_Citation_Abbreviation:  fin1
      Process_Step
        Process_Description:
          Import additional quadrangles and append to the data that
          was imported in 1992.
        Source_Used_Citation_Abbreviation:  fin1
        Source_Used_Citation_Abbreviation:  Q7.5
        Process_Date:  04/14/1997
        Source_Produced_Citation_Abbreviation:  fin2

### Spatial_Data_Organization_Information:

      Direct_Spatial_Reference_Method:  Vector
      Point_and_Vector_Object_Information
        Number of Arcs:  2476
        Number of Polygons:  2031
        Number of Polygon Labels:  2071

### 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
      Vertical_Coordinate_System_Definition
        Altitude_Datum_Name:  NGVD29
        Altitude_Distance_Units:  FEET
        Altitude_Encoding_Method:  Attribute values

### Entity_and_Attribute_Information:

      Entity_Type_Definition:  Polygon Attribute Table
        Attribute_Label:  CODE
          Attribute_Definition:  Code for hydrography polygon type
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            0                       Land
            110                     Stream
            300                     Lake or Pond
            310                     Lake or Pond
            311                     Lake or Pond, Wetland
            312                     Lake or Pond, Dry
            313                     Lake or Pond, Intermittent
            410                     Reservoir
            411                     Reservoir, Lake or Pond
            412                     Reservoir, Wetland
            413                     Reservoir, Intermittent
            420                     Inundation Area
            421                     Inundation Area, Reservoir
            430                     Gravel Pit filled with water
            431                     Gravel Pit filled with water, intermittent
            450                     Tailings Pond
            810                     Glacier or Snowfield
            821                     Rapids
            822                     Falls
            823                     Spillway
            824                     Fish Hatchery
            830                     Wash or Ephemeral Drain
            850                     Wetland
            851                     Wetland, Submerged
            852                     Wetland, Coincident Woods
            860                     Sewage Disposal Pond
            870                     Flats (tidal, sand, mud, or gravel)
          Beginning_Date_of_Attribute_Values:  01/01/1961
          Ending_Date_of_Attribute_Values:    01/01/1989

        Attribute_Label:  RVIS
          Attribute_Definition:  Photorevision code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            0                       Feature is not photo-revised
            1                       Feature is photo-revised
          Beginning_Date_of_Attribute_Values:  01/01/1961
          Ending_Date_of_Attribute_Values:    01/01/1989

        Attribute_Label:  M619
          Attribute_Definition:  Estimated elevation code
          Enumerated_Domain_Value   Enumerated_Domain_Value_Definition
          -----------------------   ----------------------------------
            0                       Elevation was printed on source map
            1                       Elevation was estimated from source map
          Beginning_Date_of_Attribute_Values:  01/01/1961
          Ending_Date_of_Attribute_Values:    01/01/1989

        Attribute_Label:  ELEV
          Attribute_Definition:  Elevation, feet
              Elevation of zero indicates that elevation was not recorded.
            Range_Domain
              Range_Domain_Minimum:  0
              Range_Domain_Maximum:  8620
          Attribute_Units_of_Measure:  feet
          Attribute_Measurement_Resolution:  1
          Beginning_Date_of_Attribute_Values:  01/01/1961
          Ending_Date_of_Attribute_Values:    01/01/1989
          Attribute_Value_Accuracy:  20
          Attribute_Value_Accuracy_Explanation:
            Accuracy of 20 feet is based on National Map Accuracy
            Standards for maps with 40-foot contours.  Some of the
            source maps have 20- or 80-foot contours, and the accuracy
            there would be 10 or 40 feet.

### Distribution_Information:

### Metadata_Reference_Information:

      Metadata_Date:  04/15/1997
      Metadata_Review_Date:  07/31/1997
      Metadata_Contact:  Gerry Daumiller