through digital motors, the orthophotograph projection head or a tracing point 
which can operate as a pencil, pen, or scribing needle. 
In summary, the overall photogrammetric measurement and mapping system 
emerging from this design concept consists of: 
1. The Omnistereomeasurer BPR basic measurement system, containing the space 
geometry of aerial photographs in stereoscopic pairs in optical-mechanical linkage 
form, the two vidicon cameras for image sensing, the electrical elements for sensing 
and converting to digital form the positions of all of the elements of orientation, 
the main and auxiliary measuring coordinatographs, with digital representation 
of X, Y, and Z positions as desired, and the separate display and control console 
for the whole system. 
2. The adjustment unit, which applies, for attainment of maximum accuracies, 
the computed values of earth curvature, atmospheric refraction, dimensional chan 
ges in exposed photographic film, and lens distortion to the digital data coming 
from the basic measurement system. 
3. The mapping coordinatograph, with digital motor drives and position verifi 
cation sensors, with tracing points for compilation of conventional maps, and for 
delineation of cross sections and any profile. 
4. The orthophotograph auxiliary unit, comprising the cathode ray tube and 
optical projector, plug-in control unit containing the selectable scanning program 
for the basic measurement system ,contour superposition unit, and intensity control. 
5. The digital data recording device, with associated logic circuitry and control 
unit attachment for manual entry of auxiliary data, for automatically recording 
space coordinate positions, and for identifying data. 
It is not anticipated the Omnistereomeasurer BPR photogrammetric system will 
completely close the gap between what is needed by and what is available to 
highway departments in photogrammetric instrumentation. The Omnistereomea 
surer BPR will, however, enable highway engineers to tailor a photogrammetric 
system to their most pressing problem areas without the capital outlay involved in 
differing aspects in each separate problem area. It will, because of the versatility 
designed into the instrument from initial concepts, apply to the solution of a broad 
range of problems with the basic unit, and adaptations with the separate auxiliary 
units, plus the ability to expand by adding other output units when and where 
they are needed and can be afforded. By doing these things, it is expected that the 
Omnistereomeasurer BPR photogrammetric system will significantly enhance the 
position of photogrammetry in highway and other engineering. 
USCOMM-DC 9128