            NATIONAL-SCALE ONTARIO LAND COVER

            DCW TRANSPORTATION AND PLACE NAMES

1. Coverage Specifications

   Original Map Scale: 1:1,000,000

   Resolution        : 1,600 to 7,300 feet, at 90 percent
                       confidence level, according to DCW
                       specifications

   Map Projection    : None, i.e. latitude/longitude

   Datum             : NAD27

   Spheroid          : Clarke 1866

   Units of Measure  : decimal degrees

2.1 Attribute Schema for DCW Transportation Coverage(AAT.DBF)

 a) Standard ArcInfo Arc Attribute Table (AAT) variables:

    FNODE_      Numeric 11,0    From or starting node number
    TNODE_      Numeric 11,0    To or ending node number
    LPOLY_      Numeric 11,0    Left Polygon number
    RPOLY_      Numeric 11,0    Right Polygon number
    LENGTH      Numeric 13,6    Perimeter, in decimal degrees
    COVER_#     Numeric 11,0    ArcInfo Polygon Number
    COVER_ID    Numeric 11,0    ArcInfo User ID

 b) Simplified DCW Transportation Attributes

    LEGEND      Character 25    simplified DCW text legend,
                                as follows:

      Code                      Description

     ROADS                      All DCW road types including
                                primary roads, secondary
                                roads and undifferentiated
                                roads (from the DCW Road
                                Layer).

     RAILROAD                   All DCW Railroad types,
                                including single track,
                                multiple track and light-
                                duty railroads (from the DCW
                                Railroad Layer).

     TRAILS                     All DCW tracks, trails or
                                footpaths (from the DCW
                                Roads Layer).

     BRIDGE,CAUSEWAY or FERRY   Selected DCW transportation
                                structures, including
                                bridges, causeways and
                                ferry routes (from the DCW
                                Transportation Structure
                                Layer).

     CABLE or PIER              Selected DCW cultural
                                landmarks, including piers,
                                wharfs or quays, or aerial
                                cableways (from DCW Cultural
                                Landmark Layer).
    Note(s):

    i)  Most maps will contain roads; some will also contain
        railroads and trails. Few maps contain bridges (or
        causeways or ferry routes) or aerial cableways (or
        piers or wharfs or quays). No single maps contains
        all five feature types.

   ii)  Due to the absence of polygon topology in this
        coverage, Left and Right Polygon Number in the
        standard ArcInfo AAT section are redundant.


2.2 Attribute Schema for DCW Populated Place Names (PAT.DBF)

  a) Standard ArcInfo Point Attribute Table (PAT) variables:

    AREA        Num 13,6    Area, in square degrees
    PERIMETER   Num 13,6    Perimeter, in decimal degrees
    COVER_#     Num 11,0    Standard ArcInfo Polygon Number
    COVER_ID    Num 11,0    Standard ArcInfo User ID


  b) Simplified DCW Place Name Attributes

    PPPTNAME    Char 40     Populated place name, or blank

    Note(s):

    i)  Some names has been left blank; these never-the-less
        indicate the presence of a small populated place.

   ii)  Most names are in lower-case text; major urban areas
        are indicated in capital letters.

  iii)  The latitude/longitude position of the populated place
        is not explicitly defined in the PAT file.

3. Narrative Description of DCW Derived Coverages

   Selected layers from the Digital Chart of the World (DCW)
   were originally conceived as a cartographic enhancement
   to the GeoGratis Canada Land Inventory (CLI) delivery
   mechanism, i.e. as a cartographic enhancement to the
   quick-look GIF and WMF files which make part of such data
   delivery mechanism. While DCW data for Canada is already
   a public domain product, the work required for the above
   objective has lead to this distribution of selected layers
   for selected areas (the CLI area) on a 1:250,000 National
   Topographic Series (NTS) map basis. These data have now
   been extended to the entire province of Ontario to
   complement the National-Scale Ontarion Land Cover.

   The DCW digital data product in it's original state is
   organized on a 5-degree by 5-degree basis. Selected layers
   have also been organized and are being distributed on a
   provincial basis. The only difference between this
   and other distribution offerings is that the selected
   layers are organized on an NTS map sheet basis.

   As part of the re-organization on a provincial basis,
   selected elements (features) from selected layers dealing
   with transportation have been combined to form a
   comprehensive 'transportation' layer. This transportation
   layer is based on Revision 4 of the DCW-VMAP data product.
   The simplified 'roads' layer in this distribution was
   compiled from Revision 4 of the DCW-VMAP data.

   Only the attribute schema of the DCW transportation layer
   has been modified (simplified) as part of the
   generalization; the coordinates of the road network and
   other transportation features have not been modified. The
   result is a simplified legend containing only five basic
   and unqualified transportation features.

   The populated place name were also revised but the
   'placename' layer in this distribution is based on the
   original DCW (Edition I) digital data product. The
   revisions made to place names (mainly in Northern Canada)
   were not deemed beneficial to the CLI objective.

   As part of the restructuring of the DCW place names, some
   place names have been corrected for spelling; others have
   been added to ensure that most NTS sheets have at least
   one point of reference. In general however, the place
   names are the same subset found on the original DCW
   digital data product.

   The user is referred to the original DCW data product, or
   to the VMAP-Revision 4 public distribution product, for
   more details of the DCW product specification.

4. Accreditation

   The distribution of the National-Scale Ontario Land Cover
   is managed by:

   The Canada Centre for Remote Sensing
   Natural Resources Canada
   Government of Canada
   Room 650 - 615 Booth Street
   Ottawa, ON, Canada
   K1A 0E9

   Based on significant research and development by:

   The Ontario Provincial Remote Sensing Office
   The Ontario Forest Research Institute

   Data processing completed by:

   Spectranalysis Inc.   and        Spatialanalysis
   Oakville, Ontario                Ottawa, Ontario

   The Ontario Ministry of Natural Resources retains
   intellectual property.

   The Ontario Provincial-scale Land Cover, consisting of
   28 classes with a 25-metre resolution, is distributed by
   the Ontario Ministry of Natural Resources in customized
   excerpts, subject to a User Agreement with the Province,
   for a charge based on partial cost-recovery. The following
   organization is the data custodian and distribution:

   Ontario Ministry of Natural Resources
   Geomatics and Data Acquisition Services
   Box 7000   300 Water Street
   Peterborough, Ontario  K9J 8M5

   Contact:   David B. White
              Phone:   (705) 755-1470
              FAX:     (705) 755-1640
              E-Mail:  david.white@mnr.gov.on.ca

(Copyright) Her Majesty the Queen in Right of Canada, 1999.
