Great Lakes Coastal Wetlands Consortium
Canadian Mapping Resources

The National Topographic Data Base (NTDB) is a digital data base developed by Geomatics Canada. It covers the entire Canadian landmass and contains the features normally found on topographic maps at scales of 1:50,000 and 1:250,000. These include hydrography, hypsography (contours), vegetation, the road network, the rail network, the electric power network, designated areas, land form, wetlands, and manmade features.

The NTDB is highly useful in both map production and geographic information systems (GIS). Listed below are links to several NTDB-related webpages and to GIS-ready index layers of 1:50,000 and 1:250,000 maps in the Great Lakes basin.

Demo Datasets
NTDB Demonstration Data Sets - 1:50,000
NTDB Demonstration Data Sets - 1:250,000

Clickable Index Maps
Click on a province or a territory to see the list of available data sets, metadata and prices for this region.
NTDB Available Data Sets - 1:50,000
NTDB Available Data Sets - 1:250,000

Map Index Layers - Great Lakes Basin
ArcView shapefiles showing the boundaries of all maps which include a portion of the Great Lakes basin.

Great Lakes Basin NTDB Map Boundaries - 1:50,000 (ZIP file)

Great Lakes Basin NTDB Map Boundaries - 1:250,000 (ZIP file)