This video presents what digital elevation models (DEM) are and how they are used in GIS. New in this updated lecture: 2.5D animations, examples from IHE Delft fieldwork area near DignelesBain, France and better illustrations.

IHE Delft OpenCourseWare can be found at http://www.gisopencourseware.org

For an overview of our GIS courses and info on tailor made trainings and advise see our folder: https://www.unihe.org/sites/default/...

More information about the book "QGIS for Hydrological Applications Recipes for Catchment Hydrology and Water Management" by Kurt Menke and Hans van der Kwast can be found at the website of Locate Press: http://www.locatepress.com/hyd

IHE Delft and Nieuwland Geoinformatie offer an online course. It includes support from experienced trainers and you'll get the official QGIS certificate after completion. More info at: http://www.learninggis.com

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0:00 Introduction
1:37 DEM acquisition
4:28 Use of DEMs
6:01 Example French Alpes
7:27 Hillshade
8:09 Contour lines
8:52 2.5 D / 3D
9:15 Drape orthophoto over DEM
9:34 Slope
9:56 Aspect
10:34 Viewshed
10:46 Topographic Wetness Index
11:08 Transects (profile tool)

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