1. Use the elevations in Figure 7.12 as a guide for drawing contour lines. The 100-foot...

     

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1. Use the elevations in Figure 7.12 as a guide for drawing contour lines. The 100-foot contour line is provided for reference. Using a 20-foot contour interval, use a pencil to draw a contour line for each 20-foot change in eleva- tion below and above 100 feet (e.g., 60 feet, 80 feet, 120 feet). You will have to estimate the elevations between the points. Label each contour line with its elevation. A ,130' 125 .142 120° 110' , 120° 131 152 100- 155' .112 79' .78' Exercise Seven / Aerial Photographs, Satellite Images, and Topogri . 163 . 139 . 118" • 83 .65 60 . 57° 7.8 Drawing a Topographic Profile 50 110' 63 . 59 158 125 87⁰ 80 118 120 124 Fig Cons topo A 1. Use the elevations in Figure 7.12 as a guide for drawing contour lines. The 100-foot contour line is provided for reference. Using a 20-foot contour interval, use a pencil to draw a contour line for each 20-foot change in eleva- tion below and above 100 feet (e.g., 60 feet, 80 feet, 120 feet). You will have to estimate the elevations between the points. Label each contour line with its elevation. A ,130' 125 .142 120° 110' , 120° 131 152 100- 155' .112 79' .78' Exercise Seven / Aerial Photographs, Satellite Images, and Topogri . 163 . 139 . 118" • 83 .65 60 . 57° 7.8 Drawing a Topographic Profile 50 110' 63 . 59 158 125 87⁰ 80 118 120 124 Fig Cons topo A

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