—" 
May, 1960 ANALYSIS OF CoNTOUR ERRORS 165 
TABLE III — CONTOUR FIDELITY ANALYSIS OF THE HILLY AREA 
(LINDIG METHOD) 
  
  
  
  
  
| Position and height | Direction Curvature 
| error error error 
| Specimen [-—————— RET — — 
Instrument | No. : : i = 
| A B A B A B 
| meters meters grads grads units units 
A-8 | 3* 99 15 8.7 22 1.11 0.006 
| 20 2 0 2.3 0 0.18 0.003 
| 25 4 0.3 4.2 0.46 0.50 0.027 
| 27 2 0.9 1.9 0.86 0.14 0.115 
28 | 6 0.3 15 0.41 1.38 0.022 
29 | 6 0.9 6.6 0.42 1.14 0.022 
30 | 1 0.1 5.8 0.28 0.49 0.017 
mean +rms | 3.5+2.2 0.4+0.3 | 6.0+4.8 0.40+0.09/0.64+0.51 0.34+0.04 
A-T eve | 12 1.2 3:2 0.38 0.29: > 0.001 
ó | 2 0.1 1.3 0.19 0.22 0.010 
9 | 23 0 15 0.43 0.80 0.019 
11 | 17 0.8 513 0.63 0.57 0.044 
21 | 11 0.2 3.4 0.83 1.00 0 
26. | 7 0.3 12 0.46 0.79 0.002 
| 35 | 5 0 2.7 0.02 0.31 0.006 
| i e ePi 
| 113-8 0.4+5 6+5 0.42+0.2700.57+0.31 .025+.035 
C-8 22 4 0 8-1 0.18 0.28 0.010 
Kelsh 7 15 0.1 8 0.4 1.1 0.004 
10 15 0:5 12 2.2 0.4 0.044 
| 12 | 13 0.1 14 0-1 1.4 0.015 
14 | 24 2.7 11 2.0 3.0 0.62 
31 | 27 0.1 17 0.6 1.0 0.007 
33 | 4 0.2 5 0.1 1:4 0.07 
34 5 0 5 0 0.3 0.014 
38 3 1.4 S 1.2 1.4 0.039 
41 98 19 | 7 0.3 3.4 0.13 
| | 23430 0.840.111 1247 0.8+0.8 | 1.5x1.1 0.1+0.2 
| 
Balplex So uult A7] 05:8. 167 1.0 3.2 0.38 
8 | 42 1.0 | 29 1.6 2.0 0.07 
40 143 0 | 94 2.0 6.0 0.06 
  
11968 0.5:+0.5| 63433 1.5+0.5| 3.4+2.2 0.17+0.18 
| 
»Not used in computing mean. 
It seems, therefore, that this part of the experiment may be considered as yielding 
two results: 
1. The rank of the instruments tested (which is not entirely exclusive inasmuch 
as some overlap exists, as may be expected statistically.) 
2. Some numerical quantities associated with these instruments under test condi- 
tions, which must be tempered in practice with a factor of safety and with economy 
of operation. Again, the comparison is not exclusive due to an overlap of a few of 
the performances, which may be expected among statistical samples.