SDETrims.DBO.Hydro_MajRivers

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?

Title: SDETrims.DBO.Hydro_MajRivers
Abstract:
This is a 1:2,000,000 coverage of streams for the conterminous United States. streams
Supplemental_Information:
Procedures_Used: The stream layer was extracted from the 1:2,000,000 Digital Line Graph files. Originally, each state was stored as a separate coverage. In this version, the individual state coverages all have been appended. Revisions: Rev. 1.0 Original DLG conversion, state-by-state. Process_Date c1986 Rev. 2.0 Converted to the Data General workstation. All states joined into a single coverage. Process_Date 01/02/92 Reviews_Applied_to_Data: Rev. 1.0 has seen extensive use in a variety of studies.

Related_Spatial_and_Tabular_Data_Sets:

Other_References_Cited:

Notes: Data layer downloaded as Major Rivers shapefile from <http://www.twdb.state.tx.us/mapping/gisdata.asp>, extracted from USGS 1:2,000,000 stream dataset.

  1. How should this data set be cited?

    Lanfear, K.J., 1991, SDETrims.DBO.Hydro_MajRivers: U.S. Geological Survey, Reston, Virginia.

    Online Links:

    • Service=sde:sqlserver:CHUCKNORRIS; Database=SDETrims; Version=dbo.DEFAULT

    This is part of the following larger work.

    Lanfear, K.J., 1991, 1:2,000,000 Digital Line Graph files of streams.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -106.627361
    East_Bounding_Coordinate: -93.511140
    North_Bounding_Coordinate: 35.991408
    South_Bounding_Coordinate: 25.837230

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 1991
    Currentness_Reference:
    REQUIRED: The basis on which the time period of content information is determined.

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • GT-polygon composed of chains (637)

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is Unknown.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 1.000000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    SDETrims.DBO.Hydro_MajRivers

    OBJECTID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    FNODE_

    TNODE_

    LPOLY_

    RPOLY_

    LENGTH

    MAJ_RIV_

    MAJ_RIV_ID

    MAJOR1

    MINOR1

    MAJOR2

    MINOR2

    CLASS

    NAME

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SEGLEN

    Shape.len

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

  3. To whom should users address questions about the data?

    Ken Lanfear
    U.S. Geological Survey, Water Resources Div. (WRD)
    Network Information Products Coordinator for WRD
    12201 Sunrise Valley Drive, MS-440
    Reston, VA 20191
    USA

    703-648-6852 (voice)
    lanfear@usgs.gov

    Hours_of_Service: 7:30am-4:00pm EST
    Contact_Instructions: Please contact through email

Why was the data set created?

This coverage was intended for use as a background display for the National Water Summary program.

How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 1)
    Source_Scale_Denominator: 2,000,000

  2. How were the data generated, processed, and modified?

    Date: 02-Jan-1992 (process 1 of 27)
    APPEND STREAMS LINE ALL

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 02-Jan-1992 (process 2 of 27)
    BUILD STREAMS LINE

    Data sources used in this process:

    • None

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    • None

    Date: 02-Jan-1992 (process 3 of 27)
    DOCUMENT STREAMS CREATE LANFEAR

    Data sources used in this process:

    • None

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    • None

    Date: 02-Jan-1992 (process 4 of 27)
    COPY/SRV1/GIS/LANFEAR/STREAMS/STREAMS

    Data sources used in this process:

    • None

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    • None

    Date: 02-Jan-1992 (process 5 of 27)
    RENAME STREAMS STREAM

    Data sources used in this process:

    • None

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    • None

    Date: 02-Jan-1992 (process 6 of 27)
    DOCUMENT STREAM UPDATE LANFEAR

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    • None

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    • None

    Date: 08-Jan-1992 (process 7 of 27)
    INDEX STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 12-Mar-1992 (process 8 of 27)
    COPY/DSDL/NEWDLG/STREAM STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 12-Mar-1992 (process 9 of 27)
    COPY/DSDL/INDEXES/STREAM/DSDL/DATALIB/CUSA/TILES/CUSA/STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 30-Sep-1992 (process 10 of 27)
    IMPORT COVER STREAM.E00STREAM

    Data sources used in this process:

    • None

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    • None

    Date: 30-Sep-1992 (process 11 of 27)
    COPY STREAM/DSDL1/CUSA/TILES/CUSA/STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 30-Sep-1992 (process 12 of 27)
    FOOTPRINT STREAM BND STREAM.BND FOOTPRINT

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 06-Jan-1993 (process 13 of 27)
    EXTERNALALL

    Data sources used in this process:

    • None

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    • None

    Date: 06-Jan-1993 (process 14 of 27)
    EXTERNALALL

    Data sources used in this process:

    • None

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    • None

    Date: 13-Jan-1993 (process 15 of 27)
    EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM.E00

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 02-Feb-1993 (process 16 of 27)
    EC STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 02-Feb-1993 (process 17 of 27)
    DELETE

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 19-Jul-1993 (process 18 of 27)
    EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 20-Jul-1993 (process 19 of 27)
    EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM.E00

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 17-Aug-1993 (process 20 of 27)
    EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM.E00 NONE

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 17-Aug-1993 (process 21 of 27)
    EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM_C.E00

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 18-Jan-1995 (process 22 of 27)
    JPORTER DOCUMENT STREAM DELET JPORTER

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 18-Jan-1995 (process 23 of 27)
    JPORTER DOCUMENT STREAM COPY /HOME/GIS/LANFEAR/NEWDOC/COVERS/STREAM JPORTER

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 20-Jan-1995 (process 24 of 27)
    JPORTER EXPORT COVER /DSDL1/CUSA/TILES/CUSA/STREAM STREAM

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 23-Feb-1995 (process 25 of 27)
    JPORTER DOCUMENT STREAM DELETE JPORTER

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 23-Feb-1995 (process 26 of 27)
    JPORTER DOCUMENT STREAM COPY /HOME/GIS/LANFEAR/NEWDOC/COVERS/STREAM JPORTER

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

    Date: 19-Sep-1995 (process 27 of 27)
    MNEGRI EXPORT COVER STREAM /SCRATCH_AREA1/MNEGRI/STREAM.E00 NONE

    Data sources used in this process:

    • None

    Data sources produced in this process:

    • None

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    See Entity_Attribute_Information

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

  5. How consistent are the relationships among the observations, including topology?

    Chain-node topology present.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
The state coverages are merely appended. No adjustments were made to edge match or to form a continuous routing for streams.

  1. Who distributes the data set?[Distributor contact information not provided.]

  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 23-Feb-1995
Metadata author:
Ken Lanfear
U.S. Geological Survey, Water Resources Div. (WRD)
Network Information Products Coordinator for WRD
12201 Sunrise Valley Drive, MS-440
Reston, VA 20191
USA

703-648-6852 (voice)
lanfear@usgs.gov

Hours_of_Service: 7:30am-4:00pm EST
Contact_Instructions: Please contact through email.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Mon Aug 20 13:57:20 2007