e finite 
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‚eomet- 
ats the 
1 in an 
re. The 
eas the 
way, a 
also be 
uires a 
is that, 
raphs, 
ld also 
‘his re- 
be ob- 
ies are 
ments 
h poor 
image 
ion of 
or the 
Photo- 
f both 
aerial 
These 
r. Sub- Fig. 2 
erator, 
sy val- 
irfaces 
k-line. 
rfaces, 
liately 
' finite 
aerial 
in this 
ay nu- 
s. The 
e ele- > 
y that à; Control points Contrast conditions G(H) 
onsid- 
iot the 
anged Zone 2 460 good contrast 
break- 
  
Network of finite elements superposed on a section of aerial photograph as resulting from automatic correlation by 
Multi-Templet-Matching. The finite elements are used for the adjustment of the parallaxes determined from the 
individual templets. The white lines represent the parallaxes and the black ones the basic network of the finite 
elements. This approach also allows the detection of break-lines and the modelling of houses. 
  
  
H- 
Zone 1 460 good contrast 7 cm 
  
H- 
8 cm 
  
H- 
Zone 3 1121 varying contrast 13 cm 
  
H- 
Zone 4 324 weak contrast 7cm 
  
H 
Zone 5 211 weak contrast 13 cm 
tching 
recise Zone 6 560 varying contrast 
only. 
jus Zone 7 252 weak contrast 
| with 
s with 
rences 
ncipal Table 1 
Results of a precision analysis of Multi-Templet-Matching. The control points were measured on an analytical plot- 
ulting ter Wild BC1 with regular grid and a mesh width of 2.5 m. 
ligher O(H) gives the standard deviation between the height of the control points and the values derived from Multi- 
airs Templet-Matching. Picture scale 1:5000, flying height above ground 1500 m. Fig. 3 gives the location of the 8 test 
zones. 
  
H- 
11 cm 
  
H+ 
11 cm 
  
H 
Zone 8 84 very weak contrast 12 cm 
  
  
  
  
  
  
543