Contour Map. Here we will open DEM in QGIS and create the contour Map. Make sure students understand that contour maps though 2-dimensional use contour lines to show elevation above sea level.
For the plotting of region the contour intervals are assumed. Elicit from students that contour maps are a convenient way to visualize flat and steep terrain especially for hikers or other people. Display the images of topographic or contour maps.
When drawing in three dimensions is inconvenient a contour map is a useful alternative for representing functions with a two-dimensional input and a one-dimensional output.
The project was launched in late 2009 and the term US Topo refers specifically to quadrangle topographic maps. 4 Now draw the 30-foot contour contour lines are usually at some even interval like 10 feet 20 feet 50 feet. The map shows a birds-eye view and allows people to visualize the hills valleys and slopes that are being mapped. Point out the flattest and steepest areas on the Crater Lake map.
