Creating contour lines from DEM

- If you already have a Digital Elevation Model,…or DEM attached to your QGIS map,…you can create contour lines from them.…A contour line is a polyline that's usually based…on elevation along a particular path.…For example, you can have a continuous contour line…that represents 20 feet above sea level,…along that line.…Let's create contours from our DEMs.…First we need to add the DEMs to the map.…So in your Raster folder double click on the…East and West, DEM, that's the .dem files.…

You'll see one has DEMW, meaning West,…and DEME, meaning East.…So first let's create the contour line…for the West DEM.…So under Raster, Extraction, Contour.…In the Contour dialog box…first we pick what file we want to export,…and that's the DEMW, meaning West.…We're going to put the file,…make sure it's a shape file,…because you notice under the files of types…you have all these different types,…DXF, GPX, and so on,…but we're going to pick shape file…and we're going to call this contour_west.…

And just put it on the desktop, make sure this is desktop.…