Length of ci: 2 Is 



L : - 1 > . t> 84) / 8" - 1OO (124.57) / 8 



- 1.547. 



MOW step off the curve length* on the map 

 to obtain a rough check on the computed values. 



7. C> US OF CENTER 



'.*. The length of the first tangent, as 

 the map shows, to 



PiPCi = PiVi Ti = 3.027 1.355 = - 

 The second tangent la 



PTi PCt = ViVi (Ti + Ti) = 2,921 (1,355 * 



he third tangent Is 



PT PC* = V. PC. Ti = 2,428 1.3&4 = 1.064. 

 The rough check by scaling Is now employed. 



8. COMPUTE STATION AND PLUS FOR 



JENT POINTS. The station 

 and plus for Pi is + 00. 

 The station and plus for PC to PiPCi 



The station and plus for PTi Is L 



1,827 = (40 + 99). 



The station and plus for PCt is (40 + 99) + PTi 

 PC. = (40 + 99) + 2< - 



The station and plus for PTa Is - L. = 



- 01) + 1.557 = (58 + .v 



The station and plus for PC. is (58 + 58) + PTi 

 PC. = (58 + 58) * LOW = (69 + 



Now we prick off the stations on the map, thus 

 checking roughly these values. 



0. COMPUTE ELEMENTS FO1. 



PS. On our map the location crosses the 

 preliminary at the point A, which we use as a 



point. There to no corresponding j> 

 the other end of the line. and. In order to obtain 

 a check, we draw the line P< ute its 



bearing and length, to be run In the field as an 

 auxiliary line 



mt write the equa- 

 tions for lines. PiP and r.v,. The general equa- 



r a straight line Is y = ax 



- (T. - 7 k ) / (, - 



(The puhnrrlpts k and n re? initial and 



final point* reflpcctlvely of any l 



