Landsat-7 imagery control points, produced by the GSDNR program, were instrumental to Geomat-International, as described by the following testimonial:

"In the context of projects aimed at updating maps in the North, the control points for Landsat-7 imagery files produced by the Centre for Topographic Information, Sherbrooke (CTIS) and accessible via the GeoBase web site, were useful to us in producing RADARSAT-1 orthoimages for the Simpson Strait region in Nunavut.

Geomat International Inc. and Procean Environment have undertaken a project targeting the development of shoreline extraction methods from Earth observation data in various regions of the world, including northern Canada. In these regions, the availability of control points is generally limited to maps at the scale of 1:250 000 and we can rarely accommodate on-site data collection.

Even though the spatial distribution of control points is optimal for use with Landsat-7 scenes, many of these control points can also be used for other image sources such as RADARSAT-1, and even Landsat-5 archival images.

Used in conjunction with Landsat-7 orthoimages, this base data, which is available for the whole of Canada, represents an information source that is unique and indispensable for industry in the realization of their mandates in Northern Canada.";

Sylvain Deslandes
Director, Remote sensing
Geomat-International
Montreal

The GSDNR Communicator: Fall 2004