E e i 1V121 A 140 ft 120 ft 100 ft 80 ft 60 ft WEST Horizontal line (lay edge of paper here) (NOTE: The selection of the vertical scale has caused exaggeration in the slopes of the landforms.) A' EAST 320 300 280 260 240 220 200 180 160 A 140 4. 160- 180- 200- A 160 180 200 200- 200- 200- 180- 180- 180 200- 180- 200- 220- Marked paper with elevations recorded from Step 2. 240- 260- 280- 300- 4. 300 200. 300
Drawing a Topographic Profile
Follow the steps illustrated in Figure 7.13 to draw a topographic profile.
- Use the profile graph in Figure 7.14 to construct a west-east profile along the line A-A' on the contour map you completed in Figure 7.12.
Step 1. Our sample profile will be along line A-A. When constructing profiles on maps provided by your instructor, do not draw on the map.
Step 2. Lay a piece of paper along the line of the profile you want to construct. In this example this is line A-A'. Mark each place where a contour line intersects the edge of the paper and note the elevation of the contour line.
Step 3. On a separate piece of paper, draw a horizontal line slightly longer than your profile line, A-A'. Select a vertical scale for your profile that begins slightly. below the lowest elevation along the profile and extends slightly beyond the highest elevation. Mark this scale on either side of the horizontal line. Lay the marked paper edge (from Step 2) along the horizontal line. Wherever you have marked a contour line on the edge of the paper, place a dot directly above the mark at an elevation on the vertical scale equal to that of the contour line. Connect the dots on the profile with a smooth line to see the finished product.
(First image is figure 7.13 and second is 7.14)
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