WETMAAP Skill 1
San Pedro - Element 21
Element 21:
Use
of Contours
Materials:
1983/82 1:24,000 scale
USGS Lewis Springs-Tombstone SE
Exercise:
1. Use the 1994 1:24,000 scale USGS Lewis Springs-Tombstone SE
2. What
is a benchmark? _______________________
3.
Find the benchmark for the top of Lewis Springs.
What is the elevation? _____________
4. The
elevation is measured from what datum (level)? _________________
5.
What is a contour line? ________________________________________
6. What is an Index contour? ______________________________________
7. The Index contours are how far are apart (in
elevation)? ______________
8. The contour interval is how many feet? ___________________________
9. What is the highest elevation within the study
site? _________________
10. What is Relief? _______________________________________________
11. What is the maximum relief within the study
site? ___________________