TABLE 1 Instruments,focal length,film format,mean standard deviation values of the space 
co-ordinates and the approximate price for each method used for data reduction 
from non-metric photography . 
Focal| Image O%m| OYm | Gom | GRm | Approx. 
Method | Instruments Used Lengt Format s " im) sd Price 
(mm) | (mm) (unit) * 
APPT | Nikon FM/Wild T2 100| _____ |0.0237 [0.0059 [0.0307 [0.0393 | 1.0+18.20 
Theodolite 
MPPT |Nikon FM/Zeiss(Jena) | 100 |180x130|0.0278 |0.0164 |0.0367 |0.0489 | 1.0+92.0 
UMK 
MPPT | Nikon FM/Wild P32 | 64 90x65 |0.0301 [0.0169 |0.0387 {0.0519 | 1.0+28.0 
MPPT Nikon FM/Galileo 150 |180x130/0.0358 |0.0202 |0.0446 |0.0607 | 1.0+ 28 
Santoni 
DLT Nikon FM 28 24x36 |0.0081 |0.0092 |0.0288 |0.0313 1.0+0.0 
* out of production 
B® unit- £ 250.00 (1986) 
TABLE 2 
The ratio of Eth/H for different ratios of B/W and D/W which maximizes the accuracy 
of the control points . 
  
B/W 
0.6 
    
0.8