|
North American Atlas - Roads
Metadata also available as - [Outline] - [Parseable text] - [XML] - [DIF]
Frequently-anticipated questions:
- Title: North American Atlas - Roads
- Abstract:
-
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 - Roads data set shows the roads of North America
at 1:10,000,000 scale. The roads included in this data set are either
those that connect major centres of population or selected frontier roads.
Roads under construction are not shown. There are three road classes:
Major roads, which are divided, multi-lane, limited access highways;
Secondary roads, which are all roads that do not meet the definition of
major roads; and Ferries, which are major ferry links which run either
year round or through periods when ice conditions permit.
This data set was produced using digital files supplied by Natural
Resources Canada, Instituto Nacional de Estadística Geografía e
Informática, and the U.S. Geological Survey.
- Supplemental_Information:
-
The Commission for Environmental Cooperation (CEC) is an international
organization created by Canada, Mexico, and the United States of America
under the North American Agreement on Environmental Cooperation (NAAEC).
The CEC was established to address regional environmental concerns, help
prevent potential trade and environmental conflicts, and to promote the
effective enforcement of environmental law. The Agreement complements the
environmental provisions of the North American Free Trade Agreement
(NAFTA). Further information on the CEC is available from
<http://www.cec.org/> or from
Commission for Environmental Cooperation
393, rue St-Jacques Ouest
Bureau 200
Montréal (Québec)
H2Y 1N9 Canada
Telephone: 514 350 4300
Facsimile: 514 350 4314
Electronic mail: [email protected]
All North American Atlas data sets are available in four data formats:
Arc/INFO Export format (e00), ArcView Shapefile, Geography Markup Language
(GML) and Spatial Data Transfer Standard (SDTS).
Although these data are distributed in geographic coordinates, the North
American Atlas Map uses a Lambert Azimuthal Equal Area projection. The
following parameters were used for the map:
Longitude_of_Projection_Center: -100.00
Latitude_of_Projection_Center: 45.00
False_Easting (metres): 0.0
False_Northing (metres): 0.0
Semi-major_Axis: 6370997.0
Denominator_of_Flattening_Ratio: 1.0
Ellipsoid_Name: Sphere
Units: metres
- How should this data set be cited?
Government of Canada, Natural Resources Canada, Canada Centre, Instituto Nacional de Estadística Geografía e Informática, and U.S. Geological Survey, 200406, North American Atlas - Roads: Government of Canada, Ottawa, Ontario, Canada.
Online Links:
- What geographic area does the data set cover?
- West_Bounding_Coordinate: 152.0
- East_Bounding_Coordinate: 4.0
- North_Bounding_Coordinate: 90.0
- South_Bounding_Coordinate: -5.0
- What does it look like?
- Does the data set describe conditions during a particular time period?
- Calendar_Date: Jun-2004
- Currentness_Reference: Publication date
- What is the general form of this data set?
- Geospatial_Data_Presentation_Form: Vector digital data
- How does the data set represent geographic features?
- How are geographic features stored in the data set?
This is a Vector data set.
It contains the following vector data types (SDTS terminology):
- What coordinate system is used to represent geographic features?
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude.
Latitudes are given to the nearest 0.000001.
Longitudes are given to the nearest 0.000001.
Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257222.
- How does the data set describe geographic features?
- Roads
- An open way for the passage of vehicles.
(Source: North American Atlas GIS Group)
- UIDENT
- The unique identifier. A unique number that is assigned to each feature
in the North American Atlas data. The last two digits of the identifier
are a suffix indicating the map layer.
(Source: North American Atlas GIS Group)
Range of values |
Minimum: | 105 |
Maximum: | 393105 |
- Type
- The road classification
(Source: North American Atlas GIS Group)
Value | Definition |
1 | A major road, which is a divided, multi-lane, limited access
highway connecting major population centres.
|
2 | Secondary road, which is any road that does not meet the definition
of a major road.
|
3 | Ferry route, which is a major ferry link that runs either year round
or through periods when ice conditions permit.
|
- Country
- The country in which the road exists.
(Source: North American Atlas GIS Group)
Value | Definition |
CAN | The road is in Canada.
|
MEX | The road is in Mexico.
|
USA | The road is in the United States of America.
|
FN | The road is outside of Canada, Mexico, and the United States of
America.
|
- Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Government of Canada, Natural Resources Canada, Canada Centre for Remote
- Instituto Nacional de Estadística Geografía e Informática
- U.S. Geological Survey
- Who also contributed to the data set?
- To whom should users address questions about the data?
Government of Canada, Natural Resources Canada, Canada Centre for
Atlas of Canada Client Services
Room 650-615 Booth Street
Ottawa, Ontario K1A 0E9
Canada
+01 613 947 2410 (FAX)
[email protected]
The North American Atlas data are intended for geographic display and
analysis at the national and continental level. These data should be
displayed and analyzed at scales appropriate for 1:10,000,000-scale data.
No responsibility is assumed by Natural Resources Canada, Instituto
Nacional de Estadística Geografía e Informática, or the U.S. Geological
Survey in the use of these data.
- From what previous works were the data drawn?
- 6M CA Roads (source 1 of 7)
-
Government of Canada, Natural Resources Canada, Canada Centre, 2002, 1:6,000,000 National Atlas of Canada Reference Map Series - Roads: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada, Ottawa, Ontario, Canada.
- Type_of_Source_Media: Online
- Source_Scale_Denominator: 6000000
- Source_Contribution: Spatial and attribute information
- CA Frameworks Road (source 2 of 7)
-
Government of Canada, Natural Resources Canada, Canada Centre, 2003, National Scale Frameworks Road Network, Canada: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada, Ottawa, Ontario, Canada.
- Type_of_Source_Media: Online
- Source_Scale_Denominator: 1000000
- Source_Contribution: Spatial information
- 10M North America (source 3 of 7)
-
Government of Canada, Natural Resources Canada, Canada Centre, 2000, North America, National Atlas of Canada Reference Map Series - Roads: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada, Ottawa, Ontario, Canada.
- Type_of_Source_Media: CD-ROM
- Source_Scale_Denominator: 10000000
- Source_Contribution: Spatial information
- 4M Mexico (source 4 of 7)
-
Instituto Nacional de Estadística Geografía e Informática, 200407, Conjunto de Datos Vectoriales Topográficos escala 1:4,000,000: Instituto Nacional de Estadística, Geografía e Informática (INEGI), Aguascalientes, Aguascalientes, Mexico.
- Type_of_Source_Media: CD-ROM
- Source_Scale_Denominator: 4000000
- Source_Contribution: Spatial and attribute information
- 5M USA Roads (source 5 of 7)
-
U.S. Geological Survey, Unpublished material, 1:5,000,000 General Reference Map - Roads: U.S. Geological Survey, Reston, Virginia, USA.
- Type_of_Source_Media: Internal file
- Source_Scale_Denominator: 5000000
- Source_Contribution: Spatial and attribute information
- NAA Hydro (source 6 of 7)
-
Instituto Nacional de Estadística Geografía e Informática, Government of Canada, Natural Resources Canada, Canada Centre, and U.S. Geological Survey, 200406, North American Atlas – Hydrography: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada, Ottawa, Ontario, Canada.
- Type_of_Source_Media: Online
- Source_Scale_Denominator: 10000000
- Source_Contribution: Spatial information
- NAA Places (source 7 of 7)
-
Instituto Nacional de Estadística Geografía e Informática, Government of Canada, Natural Resources Canada, Canada Centre, and U.S. Geological Survey, 200406, North American Atlas – Populated Places: Government of Canada, Natural Resources Canada, Canada Centre for Remote Sensing, The Atlas of Canada, Ottawa, Ontario, Canada.
- Type_of_Source_Media: Online
- Source_Scale_Denominator: 10000000
- Source_Contribution: Spatial information
- How were the data generated, processed, and modified?
- Date: 2003 (process 1 of 6)
-
Linework from the 1:6,000,000 Atlas of Canada road network was
generalized and fitted to the North American Atlas hydrography and
populated places layers. The 1:1,000,000 National Scale Frameworks Road
Network, Canada was used as a supplement to check selection and
position. The attribute for the country was added to the data.
Data sources used in this process:
- 6M CA Roads
- CA Frameworks Road
- NAA Hydro
- NAA Places
- Date: 2003 (process 2 of 6)
-
Linework from the 1:5,000,000 United States General Reference Map was
generalized and fitted to the North American Atlas hydrography and
populated places layers. The attribute for the country was added to the
data.
Data sources used in this process:
- 5M USA Roads
- NAA Hydro
- NAA Places
- Date: 2003 (process 3 of 6)
-
Linework from the 1:4,000,000 Topographical Dataset for Mexico was
generalized and fitted to the North American Atlas hydrography and
populated places layers. The attribute for the country was added to the
data.
Data sources used in this process:
- 4M Mexico
- NAA Hydro
- NAA Places
- Date: 2004 (process 4 of 6)
-
Roads for regions outside Canada, Mexico, and the United States of
America were compiled from the 1:10,000,000 North America National Atlas
of Canada Reference Map Series data set. Linework was fitted to the
North American Atlas hydrography and populated places layers.
Data sources used in this process:
- 10M North America
- NAA Hydro
- NAA Places
- Date: 2004 (process 5 of 6)
-
The files from the three countries were combined with the file for the
regions outside Canada, Mexico, and the United States of America and the
linework was cartographically adjusted along country boundaries to
ensure correct connection of the road network.
- Date: 2004 (process 6 of 6)
-
Because the linework came from several different sources and scales, a
final cartographic review was done to the full road network to ensure
cartographic compatibility at 1:10,000,000 scale. Each country then
performed a final cartographic check to verify the selection and
position of the linework. The attributes were also verified.
- What similar or related data should the user be aware of?
- How well have the observations been checked?
Where possible, attribute data were quality controlled by creating
symbolized digital displays or hard copy plots, which were visually
verified with digital or hard copy reference data. Attribute data that
could not be verified in such a manner were interactively queried to check
for anomalies such as duplication of data in fields requiring unique
values and incorrect feature coding. Data for areas outside of Canada,
Mexico, and the United States of America are only provided for context;
Natural Resources Canada, Instituto Nacional de Estadística Geografía e
Informática, and the U.S. Geological Survey assume no responsibility
for the completeness, accuracy, or presentation of this data.
- How accurate are the geographic locations?
Positional accuracy varies throughout the data. Positions are dependent
on the accuracy of the source data and on the result of the
generalization and integration processes. Data for areas outside of
Canada, Mexico, and the United States of America are only provided for
context; Natural Resources Canada, Instituto Nacional de Estadística
Geografía e Informática, and the U.S. Geological Survey assume no
responsibility for the completeness, accuracy, or presentation of this
data.
- How accurate are the heights or depths?
- Where are the gaps in the data? What is missing?
This data set includes roads and ferry links for all of North America as
shown at 1:10,000,000 scale. The data completeness reflects the content of
the source data, the selection made by the cartographers, and the quality
control of the content performed by each country.
- How consistent are the relationships among the observations, including topology?
A quality control of the linear road and ferry links data was done in order
to ensure topological consistency within each country and across country
boundaries.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
-
All data for Canada and other areas outside of Mexico and the United
States of America are covered by the Geogratis User Agreement for Digital
Data; see <http://geogratis.cgdi.gc.ca/e_license.html>.
No use constraints are applied to data for Mexico and the United States of
America. Acknowledgment of the North American Atlas, Instituto Nacional de
Estadística Geografía e Informática, Natural Resources Canada, and (or) the
U.S. Geological Survey would be appreciated in products derived from these
data.
- Who distributes the data set? (Distributor 1 of 3)
Government of Canada, Natural Resources Canada, Canada Centre for
Room 650-615 Booth Street
Ottawa, Ontario K1A 0E9
Canada
+01 613 947 2410 (FAX)
[email protected]
- What's the catalog number I need to order this data set?
- What legal disclaimers am I supposed to read?
- How can I download or order the data?
- Who distributes the data set? (Distributor 2 of 3)
INEGI
c/o Jose Luis Ornelas de Anda
Avenida Héroe de Nacozari Sur 2301
Aguascalientes, Aguascalientes 20270
Mexico
52 449 910 5300 ext 5856 (voice)
[email protected]
- Hours_of_Service: 8:30 - 16:00 (CST)
- What's the catalog number I need to order this data set?
- What legal disclaimers am I supposed to read?
- How can I download or order the data?
- Who distributes the data set? (Distributor 3 of 3)
EROS Data Center, U.S. Geological Survey
47914 252nd Street
Sioux Falls, SD 57198-0001
USA
800 252 4547 (voice)
605 594 6589 (FAX)
[email protected]
- Hours_of_Service:
-
Monday through Friday, 8:00 a.m. to 4:00 p.m., Central Time
- What's the catalog number I need to order this data set?
- What legal disclaimers am I supposed to read?
Although these data have been processed successfully on computer systems at
Natural Resources Canada, Instituto Nacional de Estadística Geografía e
Informática, and the U.S. Geological Survey, no warranty expressed or
implied is made by these agencies regarding the utility of the data on any
other system, nor shall the act of distribution constitute any such
warranty. No responsibility is assumed by these agencies in the use of
these data.
- How can I download or order the data?
- Availability in digital form:
- Cost to order the data: Gratuit-Free
- Dates:
- Last modified: 09-Jul-2004
- Metadata author:
-
Government of Canada, Natural Resources Canada, Canada Centre for
Atlas of Canada Client Services
Room 650-615 Booth Street
Ottawa, Ontario K1A 0E9
Canada
+01 613 947 2410 (FAX)
[email protected]
- Metadata standard:
- FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
| |