114 A MANUAL FOR NORTHERN WOODSMEN 
on all operations, are not shown and cannot be shown with 
that method of representation. 
The cost of such a map is very slight over and above the 
cost of the survey work in sectioning. That in the region 
named commonly costs from $600 to $800 per township. 
If a region is divided into sections or quarter-sections, a 
good cruiser can produce a map like this as fast as he can 
travel over the country. 
Contour Maps. The actual shape of a country is best 
represented by contour lines. A contour line is a line of 
equal elevation, the line a man would follow if he traveled 
round a country keeping at a constant height, or what 
would be the shore line could a country be submerged to 
a given level. The base level of a map representing a 
country near the seashore would naturally be sea level. 
The first contour on the map might follow the line of 100 
