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surveying. 
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Officine Galileo 
Via Carlo Bini, 44, Firenze, Italy 
Representatives: W. H. Cowley 
Major D. J. Simpson, 
M.C., B.Eng. 
S. Giannini 
STAND 102 A 
Examination Hall 
Gordon Square 
Second Floor 
Exhibit 
The Stereocartograph IV. This completely universal first order triangulating 
and plotting instrument employs mechanical reconstruction of the 
perspective rays and is of the highest order of precision, the root mean 
square height error normally lying between 0-05 and 0-07 per thousand of 
the flying height when it is used with good quality photographs. 
Diapositive size: up to 23 cm. x 23 cm. 
Focal length of projectors: variable from 100 mm. to 215 mm. 
Corrections for lens distortion, earth curvature, and refraction, are applied 
by a cam. 
Optional ancillary equipment: digital coordinate recorder, tape punch- 
out and altimétrie section-drawing equipment. 
The Stereosimplex III. The Stereosimplex III is designed primarily as a 
first order plotter, having the same standard of accuracy as the Stereo 
cartograph IV but with certain less frequently used features omitted. 
Consequently for a plotter with its versatility and precision it is moderate 
in price. 
Diapositive size: up to 23 cm. x 23 cm. 
Focal length of projectors: variable from 100 mm. to 200 mm. 
Earth curvature, refraction and taking lens corrections applied by means 
of a cam. 
Accommodates vertical, oblique or moderately convergent photographs. 
Wide range of carriage movements (max. Z = 500 mm.) permits a large 
model scale. 
The Stereosimplex II. A second order plotting instrument capable of 
accommodating vertical, oblique or terrestrial photographs, this instru 
ment is simple in design and ideal for training photogrammetric operators 
as well as achieving a high rate of production plotting. 
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Stand 102A—cont. 
Diapositive size: up to 10 cm. x 10 cm. (Larger size photographs may 
be reduced by any appropriate reduction printer.) 
Focal length of projectors: variable from 62 mm. to 85 mm. 
Accuracy: root mean square height error less than ± 0-20 per thousand of 
the flying height. 
Plotting scales: may be varied from model scale by means of a precise 
pantograph working on an auxiliary table. 
The Stereosimplex IIB. For those who require to plot from vertical 
photography only, the simplified version of the Stereosimplex II has the 
latter’s ease of operation and accuracy but consequent upon its simplifica 
tion it is, for a second order plotter, very moderate in price. 
The details of accuracy, diapositive size and focal lengths of projectors are 
as for the Stereosimplex II. 
The Stereomicrometer. This is a third order plotter designed for use where 
high accuracy is not required and economy of first cost is important. 
Photographic prints or diapositives obtained from any modern camera 
may be used in this equipment which has a very rapid rate of output. A 
battery of these small, inexpensive instruments is an efficient complement 
to more elaborate higher order machines. Its price and ease of operation 
make it an attractive proposition to educational authorities concerned 
with teaching photogrammetry. 
The Stereoscope SFG 3. For the rapid scanning and accurate interpretation 
of detail this stereo-viewing instrument is ideal. It has two viewing 
magnifications—1-5 x and 4-5 x the photographic scale. Two instru 
ments may be dovetailed into each other back to back, a very useful 
characteristic when discussion on interpretation is required or when 
training interpretation staff. 
The Universal Reduction Printer RFG 3. A reduction printer designed to 
produce diapositives of the size necessary for any plotting instrument. 
Maximum negative size which can be accommodated is 23 cm. x23 cm. 
Two lenses permit reduction ratios within the ranges 1 : 1 -15 to 1 : 2-0 and 
1 : 4-5 and 1 : 6-8 giving resultant diapositive sizes of from 20 cm. x 20 cm. 
to 3-3 cm. x 3-3 cm. 
The Model VI Aerial Camera. One of the most recent additions to the 
Galileo-Santoni range of photogrammetric equipment is this camera 
fitted with a 6 in. f/5-6 wide angle lens. 
Photograph size: 23 cm. x 23 cm. 
Film length: up to 360 ft.