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Landform Mapping *NEW*
This exercise introduces students to the exciting area of 3D terrain mapping using GIS. Terrain maps can be created in a GIS to represent the surface topography or elevation ranges of the land surface. Digital terrain maps come in a variety of forms. Surveyed spot heights are often a source of information for creating terrain maps and are technically known as digital terrain models (DTMs). Other sources of topographical features include contours, breaklines, ridge lines, rivers, streams, and lake boundaries. A digital elevation model (DEM) is another type of terrain, which is a digital file consisting of terrain elevations for ground positions at regularly spaced horizontal intervals. Other sources of elevation data can be derived from aerial photogrammetry using image parallax techniques (e.g., stereoscopes can be used to see in 3D, similar to the 3D glasses used for movies and video games to create virtual reality). Similar techniques can also be used to extract elevation information from certain satellite images. More recently, RADAR (RADio Detection And Ranging) and LIDAR (LIght Detection And Ranging) images have been used for terrain mapping.
Note: ATLAS Ontario data is needed to do this lesson
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