Secondary roads (1:1,000,000)

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?
    Title: Secondary roads (1:1,000,000)
    Abstract:
    This dataset displays VMAP secondary roads, for use in the interactive Atlas of Canada's Large Intact Forest Landscapes (Global Forest Watch Canada, 2003). Vector Map (VMap) Level 0 is an updated and improved version of the National Imagery and Mapping Agency's (NIMA) Digital Chart of the World (DCW®). The VMap Level 0 database provides worldwide coverage of vector-based geospatial data which can be viewed at 1:1,000,000 scale. It consists of geographic, attribute, and textual data stored on compact disc read-only memory (CD-ROM). The primary source for the database is the 1:1,000,000 scale Operational Navigation Chart (ONC) series co-produced by the military mapping authorities of Australia, Canada, United Kingdom, and the United States. The complete database is available on a set of four CD-ROM's and contains more than 1,800 megabytes of vector data organized into 10 thematic layers. VMap Level 0 includes major road and rail networks, hydrologic drainage systems, utility networks (cross-country pipelines and communication lines), major airports, elevation contours, coastlines, international boundaries and populated places. VMap Level 0 includes an index of geographic names to aid in locating areas of interest.

  1. How should this data set be cited?

    U.S. National Imagery and Mapping Agency (NIMA), 19970100, Secondary roads (1:1,000,000): VMAP_1V10 - Vector Map Level 0 (Digital Chart of the World), U.S. National Imagery and Mapping Agency, Fairfax, VA, USA.

    Online Links:

    Other_Citation_Details:
    Data source: VMAP_1V10 - Vector Map Level 0 (Digital Chart of the World)

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -179.973819
    East_Bounding_Coordinate: 179.944108
    North_Bounding_Coordinate: 87.172804
    South_Bounding_Coordinate: 25.699619

  3. What does it look like?

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

    Calendar_Date: 1997
    Currentness_Reference: publication date

  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):

      • String (56838)

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

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 49.000000
      Standard_Parallel: 77.000000
      Longitude_of_Central_Meridian: -95.000000
      Latitude_of_Projection_Origin: 49.000000
      False_Easting: 0.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.016384
      Ordinates (y-coordinates) are specified to the nearest 0.016384
      Planar coordinates are specified in meters

      The horizontal datum used is D_Clarke_1866.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    Secondary_roads_-_1mln

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    ID

    F_CODE

    F_CODE_DES

    ACC

    ACC_DESCRI

    EXS

    EXS_DESCRI

    MED

    MED_DESCRI

    RTT

    RTT_DESCRI

    TILE_ID

    EDG_ID

    Entity_and_Attribute_Detail_Citation:
    Entities (features) and Attributes for DCW are fully described in: Department of Defense, 1992, Military Specification Digital Chart of the World (MIL-D-89009): Philadelphia, Department of Defense, Defense Printing Service Detachment Office. VMap-0 is described in: Department of Defense, Military Specification, Vector Map (VMap) Level 0 (MIL-V-89039), 9 Feb 1995.

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?

    U.S. National Imagery and Mapping Agency (NIMA)

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

    U.S. National Imagery and Mapping Agency
    8613 Lee Highway
    Fairfax, VA 22031
    USA

    (703) 264-3003 (voice)

Why was the data set created?
Display only

How was the data set created?
  1. From what previous works were the data drawn?

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

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

    (process 1 of 2)
    clipped to Canada study area

    (process 2 of 2)
    Reprojected to Lambert Conformal Conic.

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

    Global Forest Watch Canada, International, Socio-Ecological Union , and Institute, World Resources , September 2003, Digital Atlas of Canada's Intact Forest Landscapes (CD-ROM):.

    Online Links:

    • www.globalforestwatch.org

    Other_Citation_Details:
    Published in conjunction with: Atlas of Canada's Intact Forest Landscapes by Peter Lee, Dmitry Aksenov, Lars Laestadius, Ruth Nogueron, and Wynet Smith (Global Forest Watch, 2003)
    This is part of the following larger work.

    Peter Lee (Global Forest Watch , Dmitry Aksenov (Socio-Ecological Union, September 2003, Atlas of Canada's Intact Forest Landscapes: Global Forest Watch, Ottawa, Canada.

    Online Links:

    • www.globalforestwatch.org

How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?

  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?

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: None

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

    Global Forest Watch
    GIS Manager
    World Resources Institute
    Washington, DC 20002
    USA

    202-729-7600 (voice)
    202-729-7686 (FAX)
    gfw@wri.org

  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: 14-Sep-2003

Metadata author:
Global Forest Watch
c/o Susan Minnemeyer
GIS Manager
World Resources Institute
Washington, DC 20002
USA

202-729-7600 (voice)
202-729-7686 (FAX)
gfw@wri.org

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

Generated by mp version 2.7.33 on Wed Sep 17 16:02:12 2003