Name section exercise8 problems on contour lines (continued) 2. the map shown in fig. 3.7 shows spot elevations dote drainage lines, and a lake. using a cl of 5 feet, construct a topographic map of the area. (note not all of the spot elevations will lie on the lines you draw. use a brown pencil to draw the contour lines. you will have to interpolate where the lines should be drawn between points of known elevation. interpolation requires some judgment as to the placement of the lines. for example, only one spot elevation on the map is shown at the 65-foot elevation. to draw the 63-foot contour line, you must estimate where other points at that elevation lie relative to known points of elevation. thus, the 65-foot contour would probably be drawn closer to a spot elevation of 64 feet than it would to a spot elevation of 70 feet.) 50 70 100 47 .100 .90 90 100 80 00 .85 46 100 elevation 40 leet .70 100 90 70 110 *100 908080 7 70 50 *44 110 *100 100 70 80 110100 90- miles figure 3.7