THEORY OF POLYGON IC PROJECTIONS. 



35 



for 60° S. The center distance T= SB with radius TP' = 

 TP gives the projection of meridian 60° west and OT' 

 gives 60° east; also the center distance OU=S'R^ per- 

 mits the construction of 30° W. and OW = S'R' gives the 

 meridian of 30° E. 



Fig. 8.— Construction of stereographic meridian projection. 



Probably the most satisfactory way to construct the 

 projection is by means of a computed table of radii and 

 of coordinates of the center. The centers of the parallels 

 all lie on the Y axis and those of the meridians lie on the X 

 a«xis. The radii and the distances of the centers of the 



