14
B. Aerial triangulation by the ITC organisation
Table 2 gives a list of aerial triangulation carried out by the research division of the ITC.
It is, with a few exceptions, analytical triangulation by means of the Wild Stereocomparator
StK. Although the execution of these triangulations and the results are described in full in
the publications mentioned below, we will make in this report a few remarks about some
of the results.
1. SIP Massif Central (see report of Cassini-Cunietti to the Lisbon Congress)
This block of 8 strips of 20 models each was adjusted by means of the ITC-Jerie Analogue
computer. For planimetry 10 ground control points along the edges of the block were used
and for height control in total 30 height control points, distributed over two lines at the
edges of the strips and one line in the centre of the strips. Regarding the precision a
standard deviation of the residual jy-parallaxes can be mentioned of 8 microns in the
orientation points and 13 microns in other points.
Table 2. Aerial triangulations carried out by ITC-research- and consulting department
Year
Photography
Number
Instruments
Method
of
Project
scale
of
for
of block
execution
camera
models
measurement
adjustment
1960
Beilen, Dunes of
RC5a
1 : 8,000
394
St.K.
Schouwen, Terschelling
Comm. C/OEEPE
to 12,000
17 test
St.K.
as centre-pilote
models
1961
South Wales [47]
RC5a
6"/9" x 9"
1 : 37,000
379
St.K.
Rhodesia [6]
Williamson
réseau 6"
1 : 85,000
222
St.K.
ITC-Jerie
S.I.P. Massif Central
S.O.M.
1 :65,000
157
St.K.
ITC-Jerie
plate
c — 12.5 cm
Comm. B/OEEPE
RC.7
1 : 12,000
92
St.K.
ITC-Jerie
block 2.6
c = 10 cm
Comm. B/OEEPE
RC.7
1 : 8,000
110
A.7
ITC-Jerie
block 2.3
c = 10 cm
Comm. A/OEEPE
Zeiss
1 : 30,000
192
St.K.
-
Strip 13'
15/23
1962
Highways
RC.7
1 : 3,000
130
St.K.
-
£=17 cm
to 4,000
Comm. B/OEEPE
RC.7
1 : 8,000
110
St.K.
ITC-Jerie
block 2.3
c = 10 cm
ITC-anbloc
Iraq-KLM
block 15+12/14
RC9
1 : 51,000
617
St.K.
block 2/5
RC9
1 : 51,000
456
St.K.
-
block 1/4
RC9
1 : 51,000
305
St.K.
-
South Wales 2nd
measurement
RC5a
1 : 37,000
318
St.K.
ITC-Jerie
1963
Iraq-KLM
block 3/6/9
RC.9
1 : 51,000
593
St.K.
addit. + repet.
RC.9
1 : 51,000
131
St.K.
-
Iran-KLM
RC.9
1 : 30,000
534
St.K.
-
Ghana-strips
RC.9
1 :40,000
280
A.9
-
Comm. B/OEEPE
RC.7
1 : 8,000
110
St.K.
ITC-Jerie
block 2.3
c — 10 cm
Comm. A/OEEPE
strip 1. Hutwill
RC 5
1 :40,000
132
St.K.
—
1964
until june
Nigeria
RC 9
1 : 40,000
500
St.K.
ITC-Jerie