Vocabulary




 * Topography **: The art or practice of showing on maps or charts the heights and depths of the features of a place.


 * Elevation**: The height to which something is raised **b** **:** the height above sea level.


 * Bench Mark**: a point that has been accurately measured for its position and elevation


 * Contour Line**: connects places on a map that are all at the same elevation. If you walk along a contour line you neither gain or lose elevation.


 * Contour Line Interval**: the difference in elevation between neighboring contour lines.