Stuart, Edwin Roy, 1874- · New York, McGraw-Hill · leaf 66
.17033, of 15 degrees is .20795, and of 20 degrees is .36397.From a comparison of these values, it will be seen that the errorin the assumption increases with the degree of slope, but thatit is still small even for 20 degrees, which is steeper than theslopes usually encountered in all but the most… … Fig. 17.—Map Distance between Contours. represented. Thus the contours representing a 2-degree slopewould be half as far apart as those representing a 1-degree slope,as will be seen by reference to Fig. 17. In this figure the distance AB represents the vertical intervalbetween contours, and the…
Military sketching · Maps, Military
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