of program may be inadequate for our system and uneconomical. So that 
each step in the above system of computation except the last one can be 
defined as the check routines for filtering mistakes or errors of the 
original materials. This character will be summarized as follows. 
Program 1. (Block 2) has a character of check routine for the measure 
ments of fiducial marks, though in this routine we make corrections for 
photo-coordinates measured by comparator. 
Program 2. (Block 3)» although we make in this routine relative orient 
ation, it is the main purpose for us to see how much are the residual 
vertical parallaxes for all the points contained in the model, how much 
will be the discrepancies of coordinates between the points for whiph 
double measurements have been made in the adjacent two models. 
Program 3. (Block 5)* in this routine we make successive orientation 
and compute strip coordinates, but we also utilize this program for the 
case when some points were remeasured or some additional points were 
measured. If relative orientation is good enough, we would not like to 
make relative orientation once more. But using the elements already 
obtained in. program 2 we only inspect the residual vertical parallaxes 
of that points remeasured or added. 
Program 4. (Block 4 and 6), we use a same program mutually for absolute 
orientation of a single model and for strip adjustments. In this routine, 
we only inspect the residual errors at control points. If we found that 
some control points must be reidentified or resurveyed, we stop the 
computation and wait the resurveyed new material for the point concerned. 
Program 3. (Block 8), when we confirmed in program 1,2,3 and 4 that 
every kinds of residual errors are sufficiently small, we use this program 
for obtaining the final results directly from the original materials, 
using all the coefficients obtained by the preceding programs. 
Program 6. (Block 7)» if there are many strips overlapped with each 
other, we test by this program the quality of tie points. Tie points will 
also be remeasured, if they were not good enough for the purpose, (the 
accuracy required). This program is a modified one of the absolute 
orientation and is used for the formation of the block, that is the 
unification of two strip coordinate systems. 
4. Remeasurement 
The remeasurements have to be made for points as few as possible. 
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