Ottawa-Gatineau Digital Elevation Models (DEMs) consists of a sampled array of elevations for a number of ground positions at regularly spaced intervals.

Data Producer:

National Capital Commission

Publication Date:
Data Format:

Grid Coordinate System: Universal Transverse Mercator
Projection: Modified 3 Degree Transverse Mercator Zone 9
Horizontal Geodetic Datum: NAD83
Units: Metres and Square Metres
Spheroid: GRS80 6378137.0 m 6356752.314 m
Central Meridian: -76.5
Easting/Northing Unit: Metres
False Easting: 304800.0
False Northing: 0
Latitude of Origin: 0
Maximum Latitude: 80 00 00
Maximum Longitude: -75 00 00
Minimum Latitude: 0 0 00
Minimum Longitude: -78 00 00
Scale Factor: 0.9999

25cm (horizontal resolution); 2001, 2007, 2009 & 2011: "90% of the points vertically accurate to within 1 metre"; 2003: "D.E.M. points are +/- one half metre of their true ground elevation"
Authorized Users:
Carleton University students, faculty and staff

Users are required to sign a Data Use Agreement before files may be acquired. All use of the data shall acknowledge the National Capital Commission as the owner of copyright. Data is provided 'as is' and the National Capital Commission makes no warranties as to the condition, quality, completeness or freedom from error of any dataset, or its fitness for a particular use.

Content last reviewed: