Natural Resources Canada
www.nrcan.gc.ca
Natural Resources Canada > Earth Sciences Sector > Centre for Topographic Information - Sherbrooke
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Centre for Topographic Information - Sherbrooke
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Resources
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About CTI-S
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Interpretation guide of natural geographic features from ETM+ Landsat imagery and aerial photography
Introduction
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The purpose of this project is to create a visual interpretative guide to the natural geographical entities in the geospatial database (GDB) using Landsat7 ETM+ imagery and aerial photography. The methodology and information fact sheet were developed by Provencher and Dubois (2004a), and the application of this procedure to a test case has already garnered a consensus among the staff of CTI at Sherbrooke (Provencher and Dubois (2004b). The meanings of the sections of the fact sheets are explained in the Glossary.
The eight natural entities in the GDB (Centre for Topographic Information, 2004) fall under eight themes that are grouped into three domains: hydrography, landforms, and vegetation (Table 1). In practice, for interpretive purposes they are often subdivided further and represented by 17 fact sheets.
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Table 1: Hierarchy of natural geographical entities
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