Drawing Contour Lines from Elevation Data

Topographic maps use contour lines to show the shape of the land from elevation data. A contour line connects points with the same elevation. This makes a two-dimensional map that shows three-dimensional terrain in a clear way.

To build the map, start with a scaled grid. Mark the intersections th...

Topographic maps represent the Earth's surface features using contour lines that connect points of equal elevation to create a two-dimensional visualization of three-dimensional terrain.

Begin by drawing a grid to scale, marking intersections corresponding to the elevation data points...