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GEL 1008 PHYSICAL GEOLOGY |
Physical Geology On-line Lab and Helpful Lab Hints
Exercise 6: Topographic Maps
Drawing Contour Lines: Step 4
Draw the second contour line (in this case, the 20-foot line) by connecting the elevation points you marked. The 20-foot line passes through the elevation point marked 20. Notice that the line parallels and does not cross the 10-foot line.