Mr 
  
  
  
  
— DIAGRAM C’ 
40r ww 
5r F^ m4 
: 4 - 
3 
V 0 - en] E 
<Q 
8Fk 
zl p11 
  
  
  
  
  
  
  
  
  
  
  
  
  
42 -HM 10 -9 -8 -7 -6 -8 4 <3 c2 | 0 +! +2 +3 +4 +5 +6 +7 8 59 0 9H +12 
Photogrammetric leve! too low + —» Photogrammetric level too high 
Errors in feet 
  
  
Error in feet Of +1 +2| +8| 44| +5 | +6 | +7 | +8 | +9 | +10| +11| +12 
  
Frequency 24! 18] 10! 18! 7| 4| 6| 1j 1| 0| 0/|[0 |O 
  
  
Error in feet 0| -1| -2| -3| -4| -5]| -6|-7| -8| -9| -10| -11| -12 
  
Frequency 24| 18| 20| 15| 10| 16|13 | 5| 5| 4 1| 0 0 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Frequency of Error Distribution