1. Topographical Maps Section 2.4

2. Topographical Maps Topographic maps - show the surface features of an area - view the land from above (looking down) - show elevation, relief, slope

3. Topographical Maps Contour lines – connect points of equal elevation

4. Topographical Maps Contour interval – the change of elevation from one contour line to another (Ex. Every 20 feet)

5. Topographical Maps Index contour – a contour line that is drawn thicker and darker. (usually every 5 th one) -it is labeled with round numbers (Ex. 200 ft.)

6. Topographical Maps To figure out the topography of an area you look at the contour lines Closely spaced contour lines = steep slopes Widely spaced contour lines = gentle slopes or flat areas

8. Topographical Maps Closed loop with no lines inside = hilltop Closed loop with dashes inside = depression or hollow

9. Hill Depression

10. Uses of Topographic Maps Science and engineering  highway routes Business  where to build stores, factories Government  where to build schools, public buildings Everyday life  biking routes