122 A MANUAL FOR NORTHERN WOODSMEN 



furnished by a large timber tract are its streams. On 

 these transit and stadia furnish the most efficient means 

 of survey. If roads are available, the same method may 

 be employed, or another may be substituted. 



One Mile 



Surveyed bounds with chainage marks . 

 Road surveyed by stadia, reference points 

 fixed by stadia and by level - 



Strip surveys with barometer. 



On the tract used in illustration, the road, rather than 

 the stream, was used for the subdivision. The different 

 steps in the process of survey were as follows : 



1. Outside boundaries run with compass and chain. 

 Chainage marks for reference left every quarter mile. 



2. Road across the tract surveyed by transit and stadia, 

 using the needle and setting up the instrument at alternate 

 stations. Points marked at short intervals. See notes on 

 page 86. 



3. Level line run along road, giving elevation of points 

 established in the stadia traverse. 



4. Strip surveys run between the road and the boundary 



