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SUSTAINING MEMBERS 
Sustaining members of the American Society of Photogrammetry 
are engaged in every aspect of research, development, manufacturing, 
and providing photographic and photogrammetric services to Federal, 
State, and local government agencies, and commercial enterprises. 
Significant accomplishments cited by sustaining members are described 
in the following paragraphs. 
ARTOGRAPH, INC. 
Edwin C. Hirschoff 
The new Model 55C-2 Map-O-Graph direct opaque projector will be k J 
introduced and demonstrated at the Helsinki ISP Congress. The new 
instrument has six major improvements over the 55C. Most notable are 
a 50% increase in illumination, with 600 and 900-watt stages, a 
completely new transport System providing precise and smooth motion, 
and an easy-to-read scale readout system for logging scales. The 
scale range is 1/5 to.5X..A number of new accessories extend the 
capabilities of the Map-O-Graph. A microfilm adapter, a 10X scale 
adapter, 9 X 9 aerial roll film adapter, and a new transparency 
illuminator using closely spaced cold Cathode Argon Mercury tubing 
extend performance to working with virtually any type or size of 
imagery, from microfilm, 70mm chips or 9 X 9 negatives or transparencies, 
to large printed maps, charts, or other opaque material. 
BENDIX RESEARCH LABORATORIES 
U. V. Helava 
Bendix Research Laboratories have been in the forefront of 
instrument development using advanced technologies. e Ó 
The epipolar scan stereomapper (AS-11B-X), whose design principles 
were revealed in the Ottawa Congress (Helava and Chapelle, 1972), was 
constructed and is in operation (Brumm and Scarano, 1975). This 
instrument produces dense digital terrain models (grid-point elevations) 
rapidly and accurately from various kinds of input materials (Elphingstone, 
1976). Another technical accomplishment is the development of the 
ARME (Automatic Reseau Measurement Equipment) (Roos, 1975). This 
instrument measures reseau coordinates very rapidly and accurately, 
and is ready for production use. Putting prototype instruments to 
production use seems to be a rule rather than an exception. The same 
happened to the RPIE (Replacement of Photographic Imagery Equipment) 
(Jones, 1976). This instrument is capable of performing many tasks, 
but may be best understood as a very high speed, very high resolution, 
off-line orthoprinter capable of using various kinds of photographic 
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