4 
T4777 T 
A} 
  
ing 
al 
um 
had 
or 
ted 
ing 
rom 
= 
lity 
| a 
Fe 23. 
of 
ich 
all 
(8 
3. 
"he 
Ito) Ita) Ita) 
^p = He i 
3 4 | — 
E pep pue 
E F fn |. L(3) 
— Ht 12 13| — 
[s] («| [w*]-* 
e 39 [s] E. [7] = L(5) 
21 22| — 
) Down-strip ordering (——e G). 
  
  
  
  
L(5) un [ ] t9 
5 4 
| 17 | [22 | 
tun T1 L9 
[2] 
ET 
x q^ E 
n] 
© 
[S 
| o 
[1 (5j Le] [2] 
  
  
  
  
  
  
[5 TM 
3 13 18 
(ii) Across-strip ordering (———»- S) 
L() L(2) L(3) L(4) 
‘ A ” ^ 
Le 
  
[51 [7] 
i] 
[6 
5 
L(6) 
| 
LE] Ps T up [v] [m] 
7 B 17 21 
(iii) Diagonal ordering. 
L^ 
  
  
  
| 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
RE Res fa 
hd snb ed 
Lai [25 [ep [ep [wi 
I E es 
El del] [uj Lai Le) 
a [Ss peer 
  
(iv) Min. bandwidth ordering (Cuthill & McKee). 
Sce RNC: 
Ar E 
ca mtm 
FEIER EA 
(v) Spiral ordering front. 
  
  
  
  
Figure 5. Various ordering strategies, p = q= 60% (+C). 
   
  
(8-1) 
(g-1) 
(Ss) 
(9) 
   
a 
  
(s-1) 
(0-1 | 
(s) 
(a) 
tes) 
1 
e» —=9 
(s) 
(g) 
(s-1) 
(g-1). 
  
  
  
  
  
  
  
i» cemere onum e 
  
Figure 6. Pattern of M,p=q=60%,(+C) 
  
  
  
  
  
  
e bz4096 
b=20%/ b=20% g 
Figure 7:1: Photogrammetric 
rays intersections. 
Model 
0 |0 |o |n |y | |-dl1 d t 
9, 9.9.9, 9, 9 9, |, 9, 9,9,| 9,9. 
  
  
  
  
  
  
  
  
  
  
  
  
Figure 7-2- Strip of photographs (p=80%) and 
models . 
ordering (2S) is considered according to the two 
Schemes denoted by (+51), (+82). The corresponding 
patterns are shown in figure 10. 
4.7. p=g=80% 
For this case the cross models would not be 
considered as they excessively increase the number 
of models. The patterns are presented in figure 11. 
Table 1 summarises some information for the 
different cases. 
5. NUMERICAL EXAMPLE 
A land 6 x 20 kms is assumed to be covered by 
23 x 23cm aerial photographs of scale 1:10,000. 
Lines of flights are assumed once to run parallel 
to the width, second - parallel to the length. 
These flight directions did exclusively satisfy in 
this example the economic conditions for the order- 
ing (2G) and (2S) respectively. Table 2 gives a 
summary of the numerical values of the calculated 
parameters. 
6. COMPUTER GRAPHICS 
An attempt was done to produce the pattern and size 
of the matrix M by using Amstrad PC and Lotus 
graphics programme for a network s=3, g=5, p=60%, 
q=20%. The results are shown in figure 12. The 
numbers 1 simulate the basic matrix m, while the o 
represents the fill-in element. The non-zero 
envelop is also demonstrated by bold lines.