GEOG 140

Introduction to Physical Geography

Lab 7X: Isoline Mapping

Selected Answers

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Lab 7Xa: Reading Contour Maps

  1. 66° (66° east of north)
  2.  
[ vertical cross section from C to E on map ]

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Lab 7Xb: Building Your Own Contour Map

Your topo sheet should show 60m, 100m, 140m, and 200m isolines that look similar to these. It will almost certainly not be exactly like this, because there are some variations possible in interpolating contours between known points. The general trend of the landscape should be similar with three peaks on the northern side and three (possibly four) peaks on the southern side. Another thing that should be obvious is the stretching of contour lines upstream when they cross streams. Also, you should have made the two index contours (100 m and 200 m) bolder and shown their elevations here and there along them.

[ sample contour map ]

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This document is maintained by Dr. Rodrigue
First placed on web: 11/27/99
Last revised: 05/21/01

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