DLG 100K for Quad: JACKSON LAKE-E, WY - ID # : 1J067724EBD10421-509572

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Frequently anticipated questions:


What does this data set describe?

Title:
DLG 100K for Quad: JACKSON LAKE-E, WY - ID # : 1J067724EBD10421-509572
Abstract:
Digital line graph (DLG) data are digital representations of cartographic information. DLGs of map features are converted to digital form from maps and related sources. Intermediate-scale DLG data are derived from USGS 1:100,000-scale 30- by 60-minute quadrangle maps. If these maps are not available, Bureau of Land Management planimetric maps at a scale of 1:100,000 are used. Intermediate-scale DLGs are sold in five categories: (1) Public Land Survey System; (2) boundaries; (3) transportation; (4) hydrography; and (5) hypsography. All DLG data distributed by the USGS are DLG-Level 3 (DLG-3), which means the data contain a full range of attribute codes, have full topological structuring, and have passed certain quality-control checks.
  1. How should this data set be cited?

    U.S. Geological Survey Earth Resources Observation & Science Center (EROS), 19940506, DLG 100K for Quad: JACKSON LAKE-E, WY - ID # : 1J067724EBD10421-509572: U.S. Geological Survey, Sioux Falls, SD 57198 USA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -111
    East_Bounding_Coordinate: -110
    North_Bounding_Coordinate: 44
    South_Bounding_Coordinate: 43.5

  3. What does it look like?

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

    Calendar_Date: 01-Jan-1981
    Currentness_Reference: Ground condition

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

  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.

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 12
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: .09996
      Longitude_of_Central_Meridian: -123 00 00
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000
      False_Northing: 0.0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 2.54
      Ordinates (y-coordinates) are specified to the nearest 2.54
      Planar coordinates are specified in 2.54

      The horizontal datum used is unknown.
      The ellipsoid used is Clark 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_Datum_Name: National Geodetic Vertical Datum of 1929
      Altitude_Resolution: 1
      Altitude_Distance_Units: feet or meters
      Altitude_Encoding_Method: attribute values
      Depth_System_Definition:
      Depth_Datum_Name: Mean lower low water
      Depth_Resolution: 1
      Depth_Distance_Units: feet or meters
      Depth_Encoding_Method: attribute values

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    DLG3 attribute codes are used to describe the physical and cultural characteristics of DLG node, line, and area elements. Attribute codes are used to reduce redundant information, provide enough reference information to support integration with larger data base, and describe the relationships between different cartographic elements. Each DLG element has one or more attribute codes composed of a three-digit major code and a four-digit minor code.
    Entity_and_Attribute_Detail_Citation:
    U.S. Department of the Interior, U.S. Geological Survey, 1987 Digital Line Graphs from 1:100,000-Scale Maps -- Data Users Guide 2; Reston, Virginia. U.S. Department of the Interior, U.S. Geological Survey, 1990, Standards for Digital Line Graphs; Reston, Virginia Softcopies of the DLG Standards, including both DLG-3 and DLG-F series, are available in PDF format at: <http://mapping.usgs.gov/standards/index.html>


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?

    U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
    Attn: lta@usgs.gov
    Long Term Archive (LTA) Representative
    Long Term Archive (LTA), U.S. Geological Survey (USGS)
    Sioux Falls, SD 57198-0001
    USA

    605-594-6151 (voice)
    lta@usgs.gov

    Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
    Contact_Instructions: lta@usgs.gov


Why was the data set created?

DLGs depict information about geographic features on or near the surface of the Earth, terrain, and political and administrative units. These data were collected as part of the National Mapping Program.


How was the data set created?

  1. From what previous works were the data drawn?

    map1 (source 1 of 1)
    U.S. Geological Survey or another mapping agency in cooperation with USGS., 19810101, JACKSON LAKE: U.S. Geological Survey, Reston, Virginia.

    Type_of_Source_Media: stable-base material
    Source_Scale_Denominator: 100000
    Source_Contribution: spatial and attribute information

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

    Date: unknown (process 1 of 2)
    For Digital Revision Status = Not digitally revised: This Digital Line Graph was digitized from the USGS source quadrangle by either the National Mapping Division, one of their cooperators, or one of their contractors. The digital data were produced by one of the following methods:
    (1) Scan a stable-based copy of the graphic materials. The scanning process captured the digital data at a scanning resolution of at least 0.0001 inches; the resulting raster data were vectorized and then attributed on an interactive editing station.
    (2) Scan the paper map. The scanning process captured the digital data at a scanning resolution of at least 0.001 inches; the resulting raster data were vectorized and then attributed on an interactive editing station.
    (3) Scan a stable-based copy of the graphic materials. The resulting raster data were then manually digitized and attributed on an interactive editing station. The resolution of the digital data is at least 0.001 inches.
    (4) Manually digitize from a stable-based copy of the graphic material using a digitizing table to capture the digital data at a resolution of at least 0.001 inches; attribution was performed either as the data were digitized or on an interactive edit station after the digitizing was completed.

    Person who carried out this activity:

    lta@usgs.gov
    Long Term Archive (LTA) Representative
    Long Term Archive (LTA), U.S. Geological Survey (USGS)

    605-594-6151 (voice)
    lta@usgs.gov

    Contact_Instructions: lta@usgs.gov
    Date: unknown (process 2 of 2)
    The determination of the DLG production method was based on various criteria, including feature density, feature symbology, and the availability of production systems. Four control points corresponding to the four corners of the quadrangle were used for registration during data collection. An eight parameter projective transformation was performed on the coordinates used in the data collection and editing systems to register the digital data to the internal coordinates used in PROSYS, and a four parameter linear transformation was performed from the PROSYS internal coordinates to Universal Transverse Mercator (UTM) grid coordinates. The DLG data were checked for position by one or more of the following processes: (1) Compare plots of the digital data to the graphic source, (2) Compare the digital data to the digital raster scan.
    DLG data classification was checked by at least one of the following processes: (3) Compare plots of the digital data to the graphic source, (4) Compare the digital data to the digital raster scan.

    Person who carried out this activity:

    Attn: lta@usgs.gov
    Long Term Archive (LTA) Representative
    Long Term Archive (LTA), U.S. Geological Survey (USGS)

    605-594-6151 (voice)
    lta@usgs.gov

    Contact_Instructions: lta@usgs.gov
  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?

    The identification of features is provided by the distinct electromagnetic energy it emits,reflects, or otherwise transmits. This is called the spectral signature. Other signatures such as tone (lightness or darkness), texture (surface roughness or smoothness), pattern,shadow, shape, and size are as important. Thus, through the use of the thematic mapper sensor, such elements as water features, soils, and vegetation can be identified and distinguished from each other.

  2. How accurate are the geographic locations?

    For Digital Revision Status = Not revised:

  3. How accurate are the heights or depths?

    For Hypsography and Hydrography Only: For Digital Revision Status = Not revised:

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

    For 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 Digital Revision Status = Limited Update: This file has undergone a 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 cannot be reliably photoidentified but that are not considered particularly prone to change.
    For Digital Revision Status = Standard Update: This file has undergone standard update digital revision. The data completeness of this file meets NMD standards for feature content.

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

    Topological requirements specify that: (1) lines must begin and end at nodes; (2) lines must connect to each other at nodes; (3) lines do not extend through nodes; (4) left and right areas are defined for each line element and are consistent throughout the file; (5) and the lines representing the limits of the file (neatline) are free of gaps.
    The tests of logical consistency areperformed by the USGS PROSYS program. The neatline was generated by connecting the four corners of the digital file, as established during initialization of the digital file. All data outside the enclosed region are ignored and all data crossing these geographically straight lines is clipped at the neatline. Neatline straightening aligns the digitized edges of the digital data with the generated neatline or the longitude/latitude lines in geographic coordinates. All internal areas are tested for closure using PROSYS.


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:
There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to <http://www.usgs.gov/privacy.html> for the USGS disclaimer.

  1. Who distributes the data set? (Distributor 1 of 1)

    U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
    Attn: lta@usgs.gov
    Long Term Archive (LTA) Representative
    Long Term Archive (LTA), U.S. Geological Survey (USGS)
    Sioux Falls, SD 57198-0001
    USA

    605-594-6151 (voice)
    lta@usgs.gov

    Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
    Contact_Instructions: lta@usgs.gov
  2. What's the catalog number I need to order this data set?

    1:100,000-scale digital line graphs

  3. What legal disclaimers am I supposed to read?

    Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    Adequate computer capability is the only technical prerequisite for viewing data in digital form. You may return here at any time and add to your data request before final submission.


Who wrote the metadata?

Dates:
Last modified: 06-Feb-2001
Last Reviewed: 20-May-2013
Metadata author:
LTA, U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
Attn: lta@usgs.gov
Long Term Archive (LTA) Representative
Long Term Archive (LTA), U.S. Geological Survey (USGS)
Sioux Falls, SD 57198-0001
USA

605-594-6151 (voice)
lta@usgs.gov

Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
Contact_Instructions: lta@usgs.gov
Metadata standard:
Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998 Version 2)


Generated by mp version 2.9.21 on Sun May 19 14:08:45 2013