Topography
What is topography?
Topography is the mapping of elevation
What does a topographic map tell you, that other maps can't?
Topographic maps show elevation
Who might use a topographic map (and why)?
Pilots can use topographic maps so that when they're flying they know where to go and where to avoid high elevation places.
Elevation: Height of a place relative to a reference height
Contour lines: A line connecting points that have the same elevation
Contour interval: The difference in elevation between two adjacent contour lines
Depression Contour: Contour lines indicating a downward slope (drawn with hatch marks)