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Watch the lecture on how to create a TIN and contours from spot elevations: https://youtu.be/K-wwJ1QYv-U (29m 06s)
The attached .pdf is a map with spot elevations collected by the field crew. These spot elevations have a horizontal location of (N,E) shown on the map by an “x”. The elevation of each “x” is listed as well.
In the above lecture I have started the homework assignment for you. I show how to draw the breaklines that were also given to me by the field crew. I then finished drawing the TIN, which results in a network of irregular triangles. Next I put in tic marks on each triangle line (as described in the video).
What you must do is draw the contour lines (as I did in the video for one triangle). Use a straightedge when drawing the contours. Use two triangles (if you have them) to help you make the contours as parallel as possible. I suggest putting down a cryptic elevation at each tic mark to help you to draw the contours correctly (as described in the above lecture)