en ver- 
nwand- 
sulation 
en klar 
verfah- | 
zeichnet 
rometer 
ıng der 
'rgeben. 
\iedener 
ktischen 
ı Fällen 
erungen 
hler der 
Instru- 
ttelwert 
gen in 
rchzu- 
e Gren- 
Fehlern 
)e anzu- 
trie an- 
ne Weg, 
ibinierte 
ite Môg- 
ierfort- 
hten. 
Vermes- 
948. 
rreurs et 
nes. Lau- 
Triangu- 
s. Photo- 
rning the 
erial Pic- 
eriai Pic- 
; Decem- 
her's Pa- 
1 the U.S. 
Enginee- 
  
  
  
  
  
  
COMMISSION III HO? 
Appendix to the INT. ARCHIVES OF | 
PHOTOGPAMMETRY, Vol. XIL4, 1956 | 
  
  
Communication to 
VIII International Congress for Photogrammetry 
Reprint from 
Svensk Lantmäteritidskrift 
Congress Number 1956 
Commission 111 
ERROR DISTRIBUTION IN AERIAL TRIANGULATION 
STRIPS AFTER APPLICATION OF THE PRINCIPLES OF 
NUMERICAL CORRECTIONS AND SIMPLE COORDINATE 
TRANSFORMATION PROCEDURES 
A brief summary 
By 
DB. Hallert — L. Ottoson 
Stockholm 70 
Introduction 
Below we assume an aerial triangulation to have been performed un- 
der the following main conditions. 
1. Comparatively flat ground has been photographed with nearly ver- 
tical pictures and under normal, uniform conditions. 
2. Systematic errors of the pictures and of the plotting instrument 
have been determined as completely as possible with the aid of the 
methods given in for instance [1], [2], [3] and [7]. The remaining 
systematic errors of the reconstructed pencils of rays have been given 
as vector diagrams, from which the systematic errors of the x- and y- 
parallaxes can be determined. 
3. The discrepancies between the fiducial marks of the images and 
the fiducial marks of the projectors have been measured and recorded 
for each image adjustment. 
4. The relative orientation has been performed with an arbitrary 
method but the residual y-parallaxes after the relative orientation have 
been measured and recorded in details around at least 9 symmetrically 
located points in each model. 
5. The scale has been transferred from model to model by elevation 
measurements near the nadir points. Discrepancies of the elevations in 
the scale transfer points have been recorded. 
6. In each model the machine coordinates have been measured in a 
number of symmetrically located pass points. The machine coordinates