14 
Table III. Residual errors of check points 
NAME 
VH 
VK 
VY 
m 
m 
m 
1 
0.97 
-0.70 
-0.03 
2 
0.46 
0.40 
-0.62 
3 
0.67 
-0.08 
0.90 
4 
-0.86 
0.44 
0.54 
5 
-0.73 
-0.60 
-0.75 
6 
-0.98 
-0.81 
-1.01 
7 
0.96 
-0.66 
0.33 
8 
0.28 
-0.74 
0.66 
2. The distribution of the control and tie points is as table I 
3. Residuals of the control and tie points are as table II. In the table, it 
seems that the accuracy is satisfactory. 
4. Residuals of the check points are as table III. the residuals of the check 
points at the center are comparatively small regardless of where are used 
only two control points at the both ends of the third course. 
It shows that accuracy of this computation is sufficient. The time required 
the terms and of weighing for compute one model is 3.5 miuntes. 
V. Conclusion 
In the electronic computers available at present, medium computer which 
possessed 2000 of memory capacity is poorest, nevertheless we obtained above 
results. 
If we used the computer possessed 4000 or 8000 capacity, we had more short 
times for the computations. There are problems of deal with data by increasing 
the terms and of weighing of between the control and tie points. 
Acknowledgement 
The author thanks Mr, Katsuichi Naohara, Chief of Surveying Department, 
Kokusai Aerial surveys Co, Ltd, for his leadership in accomplishing this investiga 
tion. 
References 
1. M. J. Miles: “Methods of Solution of the Adjustment of a Block of Aerial Triangulation,” 
The Photogrammetric Record, Vol. IV, No. 22, October 1963. 
2. Dr. H. G. Jerie: “Block Adjustment by Means of Analogue Computers” Photogrammetria, 
Vol. XIV 1957-1958, 4. 
3. Dipl.-Ing. B.-G. Müller: “Zur Blockweisen Aerotriangulation” Bildmessung und Luft 
bildwesen. Heft 4, 30 Jahrgang 1. 12. 1962.