A joint venture involving the National Atlas programs in Canada (Natural
Resources Canada), Mexico (Instituto Nacional de Estadística Geografía e
Informática), and the United States (U.S. Geological Survey), as well as
the North American Commission for Environmental Co-operation, has led to
the release (June 2004) of several new products: an updated paper map of
North America, and its associated geospatial data sets and their metadata.
These data sets are available online from each of the partner countries
both for visualization and download.
The North American Atlas data are standardized geospatial data sets at
1:10,000,000 scale. A variety of basic data layers (e.g. roads,
railroads, populated places, political boundaries, hydrography,
bathymetry, sea ice and glaciers) have been integrated so that their
relative positions are correct. This collection of data sets forms a base
with which other North American thematic data may be integrated. Any data
outside of Canada, Mexico, and the United States of America included in
the North American Atlas data sets is strictly to complete the context of
the data.
The North American Atlas - Populated Places data set shows a selection of
named populated places suitable for use at a scale of 1:10,000,000. Places,
which refer to individual municipalities, are always shown using point
symbols. These symbols have been fitted to the North American Atlas roads,
railroads, and hydrography layers, so that the points represent the
approximate locations of places relative to data in these other layers.
The selection of populated places was based on local importance (as shown
by population size), importance as a cross-border point, and, occasionally,
on other factors. All capital cities (national, provincial, territorial or
State) are shown for Canada, Mexico, and the United States of America.
Attributes were added to the data to reflect population class, name, and
capital. Cartographic considerations were taken into account so that names
do not overlap in crowded areas, nor are there too many names shown for
sparsely-populated areas.