184- 
Comparing 
method i 3 
tine and costs of each steps when the stereoplotting 
concerned, v;e obtain data showed in table 4. 
Table 4 
Time and cost required for stereoplotting method 
Step 
Exterior elevations 
Interior 
elevations 
Time 
Cost 
Time 
Cost 
I 
CO 
6 % 
45% 
40% 
II 
4 % 
5% 
15# 
1955 
III 
42 % 
49 % 
25% 
27% 
IV 
' 4655 
40 % 
15% 
14% 
In costs three main components were taken into account: 
- staff expenses of work3 /salaries, transport and accom modation/ 
- costs of materials, 
- amortization costs. , 
The costs and time needed for exterior elevations when the 
rectification method is applied are listed in table 5• 
Time and cost required for 
the rectification method 
Table 5 
Step 
Exterior 
elevations 
Time 
Cost 
I 
7455 
54 % 
II 
14% 
20% 
III+IV 
12 % 
26% 
Comparing both methods we can 
find that the time as well as 
costs in stereometric method 
are about 2.5 times greater 
than in rectification method. 
For orthoprojection the compa 
rison of costs and time is 
shown in table 6. 
This method is cheaper then 
the stereometric one about 1.4 
times, but more expensive 
about 1.8 times then the recti 
fication method. The cost of 
the rectification method 
increase almost proportionally 
to the number of photographs. 
The costs of stereoplotting 
method depends mainly on rich 
variety of interior decora 
tions. But the costs of 
orthoprojection method depends in some degree on the number of 
stereomodels and on the degree of surface nonflatnes /width of 
slit and profiling time/. 
The comparison of instrument productivity is as follow: 
' camera/plotter camera/rectifier camera/orthophot 
0.5 - 6.0 0.4 - 0.6 1.3 - 1.8 
Time and cost required for 
orthoprojection method 
Table 6 
Step 
Exterior 
Elevations 
Time 
Cost 
I 
465 ? 
26% 
II 
25 % 
22/5 
III+IV 
29% 
5255