Abstract:
The Vector Map Level 0 (VMap0) and Vector Map Level 1 (VMap1) databases are
designed to provide vector-based geospatial data at low (VMap0) and medium
(VMap1) resolutions. The content of VMap0 database is similar to the previously
published Digital Chart of the World (DCW), enhanced with low-resolution
bathymetry for global coverage. A reference
... library with general information is
included to orient the user, while the index of geographic names helps in
locating areas of interest.
The content of VMap1 database corresponds to the topographic maps at
the 1:250 000 scale. The VMap1 data originate from the National Topographic
Data Base (NTDB) at the 1:250 000 scale. Different map sections and recoded
entities in FACC (Feature Attribute Coding Catalog) codes according to VMap1
data specifications were added to the NTDB's data.
The VMap0 data are organized in topologically layered data,
representing six continental regions of the world. They are contained on four
CD-ROM for nearly two gigabytes of data:
Disk 1 - North America (NOAMER)
Disk 2 - Europe and North Asia (EURNASIA)
Disk 3 - South America, Africa, and Antarctic (SOAMAFR)
Disk 4 - South Asia and Australia (SASAUS)
The VMap1 data are organized in topologically layered data and
sectioned in libraries. The Canadian territory is covered by 24 librairies of
different sizes and map sections.
Finally, the VMap0 and VMap1 databases consist in twelve thematic
layers: boundaries, industry, tile reference, data quality, library reference,
transportation, elevation, physiography, utilities, hydrography, population,
vegetation.
The primary source for the database is the 1:1 000 000 scale Operation
Navigation Chart (ONC) series, coproduced by the military mapping authorities
of Canada and many other countries. Data gaps may exist where source
information is not available.VMap0 and VMap1 are an excellent source of base
information for all aspects of global (VMap0), national and regional (VMap1)
monitoring as well as for studying and developing research methodologies in
geography, spatial analysis, earth sciences, social sciences, resource
management, and communications. It provides a base for an unlimited number of
value-added spatial overlays.
Spatial Data Organization Information -
Indirect Spatial Reference:
Direct Spatial Reference:
Raster Object Type:
Row Count:
Column Count:
Vertical Count:
Spatial Reference Information -
Horizontal Coordinate System Definition -
Planar -
Planar Coordinate Encoding Method:
Coordinate Representation:
Abscissa Resolution:
Ordinate Resolution:
Distance and Bearing Representation:
Distance Resolution:
Bearing Resolution:
Bearing Units:
Bearing Reference Direction:
Bearing Reference Meridian:
Planar Distance Units:
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name:
Semi-major Axis:
Denominator of Flattening Ratio: 
