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2.) The. individual operator differences in parallax perception allows this 
approach to apparently fail if care is not taken. 
The package TODSR is more versatile than MTODSR. It is, however, still in 
the testing phase. It will probably need some minor changes to be of equal 
easy use with independent models. A difference which will remain is that 
TODSR requires the recording of both the photo- and model coordinates of 
each triangulation point when used in conjunction with PAT-M, while MTODSR 
needs only the model coordinates. 
The package TODSR offers the possibility to work with unmarked minor con- 
trol points (i.e. points only known by their photo coordinates). It also 
produces a well defined relative orientation (by means of the six added 
points) in cases where the solution from measured Y-parallaxes would be 
ill-conditioned. 
Conclusions and recommendations 
When the package TODSR is finalized, MTODSR can probably be abandoned. The 
regular data collection program of the DSR normally records both the photo- 
and model coordinates of each point. Transfer of the photo coordinate 
file(s) to the VAX will be the only additional action required if TODSR is 
used with PATM rather than MTODSR. 
In order to allow quick inspection of the orientation and to overcome the 
perceptual differences between operators a program should be available 
which allows : 
1.) Visiting and measuring points either automatically selected (e.g. four 
corner points only) or selected by the operator. 
2.) Computation of "index offsets" and their accuracy using these 
measurements. 
3.) Correction of the relevant data files to realize the computed index 
changes. 
In a production environment with shiftwork such a program would also be 
helpful for the change of shift within a model. 
The concepts of the two packages are very specific for use with the orien- 
tation software of KERN DSR analytical stereoplotters. It cannot be easily 
adapted for plotters with a different software structure. The concepts are 
not limited to the adjustment programs PAT-M and PAT-B nor to the operating 
system (VAX-VMS). Adaptation of the programs and/or command procedures 
would be necessary for use in a different environment. 
The installation of both the adjustment program(s) for aerotriangulation 
and the software outlined above in the main processor of the DSR would be 
most useful. Care must be taken, however, not to delay the stereo restitu- 
tion work. Therefore this is only feasible if an operating system capable 
of foreground- background processing or better a "multi task system" is 
available. 
73