High barriers built to hold back floodwaters of a river or a lake.
The height of the land over sea level (the level of the ocean)
A low area between mountains or hills
Shows the higher and lower parts of an area; they often use different colors and textures to display information.
Show a place at a particular time in history.
Low, flat land near the ocean
An area of land at the foot of a mountain range
1.
Relief Map
2.
Elevation
3.
Piedmont
4.
Coastal Plain
5.
Valley
6.
Historical Map
7. levee(s)