Title
North American Atlas – Basin Watersheds - Watershed line
License
Open Government Licence 2.0 - Canada (OGL-Canada-2.0)
+ You are free to: Copy, modify, publish, translate, adapt, distribute or otherwise use the Information in any medium, mode or format for any lawful purpose.

+ For more info see https://open.canada.ca/en/open-government-licence-canada.
Abstract

This collection is a legacy product that is no longer supported. It may not meet current government standards.

A boundary line between watersheds, or a shoreline or international boundary.

The North American Atlas – Basin Watersheds data set shows watersheds in North America at 1:10,000,000.  A watershed is an area encompassing part or all of a surface drainage  basin, a combination of drainage basins, or a distinct hydrologic feature.  Watersheds are mapped in a hierarchical system, with the largest units encompassing the entire drainage areas of major rivers or river systems, or encompassing seaboard areas.  Within these large units, subsequently smaller units encompass the drainage areas of smaller rivers and streams.  Watersheds are classified differently in Canada, Mexico and the United States; the data set includes a continental classification (the North American Watershed, or NAW level), as well as the classification unique to each country.  This data set was compiled from each country’s watershed file and adjustments were made to the data to resolve misalignments and mismatches across international borders. 

Publication Date
Type
Vector Data
Keywords
Category
Inland Waters
Inland water features, drainage systems and their characteristics. Examples: rivers and glaciers, salt lakes, water utilization plans, dams, currents, floods, water quality, hydrographic charts.
Regions
North America
Responsible
Group
Government of Canada
Attribution
Government of Canada, Natural Resources Canada, Mapping Information Branch, The Atlas of Canada
More info
-
Maintenance Frequency
There Are No Plans To Update The Data
Restrictions

Please see, https://open.canada.ca/en/open-government-licence-canada 

Edition
Record Modified: 2022-02-01
Purpose

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 y Geografía, National Atlas of the United States, or the Commission for Environmental Cooperation in the use of these data.

Language
English
Supplemental Information

Source: https://natural-resources.canada.ca/science-and-data/science-and-research/earth-sciences/geography/topographic-information/download-directory-documentation/17215

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: 1 514 350 4300

Facsimile: 1 514 350 4314

Electronic mail: info@cec.org

These data are distributed in both geographic coordinates (through National Atlas of Canada, INEGI, and National Atlas of the United States), and Lambert Azimuthal Equal Area projection (CEC).  The following parameters are used for the Lambert Azimuthal Equal Area projection:

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

Spatial Representation Type
vector data is used to represent geographic data

Layer WMS GetCapabilities document

Attribute Name Label Description
fid
UIDENT Uident 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.
HU_Level Hu_level The level of the Hydrologic Unit which the line delimits. Hydrologic Units are used in the United States of America to describe various levels of watersheds, in a nested hierarchy.
TYPE_WSC Type_wsc The type of Water Survey of Canada drainage area which the line delimits. Drainage areas are used in Canada to describe various levels of watersheds, in a nested hierarchy.
COUNTRY Country The country in which the watershed boundary line exists.
EDIT_DATE Edit_date The most recent date on which edits were made to the line, in the format yyyymmdd.
EDIT Edit The type of edit performed on the line.
NAW_LEVEL Naw_level The North American Watersheds level of the watershed which the line delimits.
Shape_Leng Shape_leng The length of the line. Units are unknown.

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