urements of
known resi
l'he solution
tion. If we
roved. — If
e following,
lution. This
four measu-
ye have five
will get the
'ot improve
ctical appli-
rs. l'urther-
10del to the
ere the sys-
ditions and
a--
(d
0.08294
0.07560
0.06947
0.06425
0.05977
0.05587
0.05245
0.04942
0.04672
0.04431
0.04213
0.04015
0.03836
0.03671
0.03520
0.03381
0.03253
0.03134
0.03023
0.02920
15
the accidental errors are mainly compensated from the parallax condi-
tions. — If the influence of the systematic errors is to be studied, one
can compare the discrepancies of the closure conditions of the absolute
orientations and corresponding quantities calculated by aid of parallaxes
(Eq. 1.2).
]t is interesting to note that some authors have reached quite diffe-
rent solutions wich are supposed to give correct solution when conside-
ring only systematic errors. — l'rom a mathematical point of view the
problem has not a different solution in such a case. — However, the
theory of mean square errors holds no more good. The results will nor-
mally be very much better than the computed mean square errors indi-
cate.
Practical applications
According to the new formulas there has been a complete practical
application with promising results. The test-chain had 8 models and the
triangulation was performed with a Wild A 5.
In a separate paper there will be a complete publication of the nume-
rical results. :
Litterature
1. Bachmann, W. K.: Théorie des erreurs et compensation des triangulations
aériennes. Lausanne 1946.
2. Bjerhammar, A.: Rymdtriangulering fór fotogrammetriska ändamâl. Svensk
Lantmäteritidskrift 1950.
3. Bjerhammar, A.: Adjustment of Aerotriangulation. Photogrammetria II 1950
1951.
4. Bjerhammar, A.: Application of Calculus of Matrices to Method of Least
Squares. Kungl. Tekniska Hôgskolans handlingar nr 49, 1951.
wn
Hallert, B.: Uber die Fehlertheorie der Aerotriangulation und einzelner Bild-
paare. Zeitung fiir Vermessungswesen 10, 1955.
6. Roelofs, R.: Adjustment of Aerial Triangulation by the Method of Least
Squares. Photogrammetria VIII, 1951—1952.
