40 



A MANUAL FOB NORTHERN WOODSMEN 



D. M. D.'s of the several courses multiplied by the corre- 

 sponding latitudes, north latitudes being reckoned posi- 

 tively and south latitudes negatively. If the tract is kept 

 on the right in the course of the survey, the result comes 

 out with a minus sign. 



An operation of this kind, starting with the balanced 

 latitudes and departures, may be conveniently arranged 

 as follows : 



2)969.63 



484.81 sq. ch. 

 Area = 48.48 acres. 



3. PLOTTING 



The computation of traverse, if it aids in testing the 

 accuracy of a survey, gives also data for plotting it with 

 ease and accuracy. Taking the initial point of the survey 

 as the starting point for a meridian and a base line vertical 

 to it, the position of the second point of the survey may be 

 fixed by measuring off its latitude on the vertical line, its 

 departure on the horizontal, and from these points drawing 

 lines parallel to the base and the meridian until they inter- 

 sect. The latitude of the second course may then be added 

 to that of the first and the two departures also added to- 

 gether, when the third point of the survey may be fixed in 

 the same way as before, and so on until the survey is 

 finished. The points thus fixed may then be joined by 

 lines representing the courses. The position of the points 

 in the above survey as taken from the balanced figures on 



