€ 9 
Third, a block of 5 by 5 photographs with 60% forward overlap 
and 60% sidelap was adjusted using a bundle method and 19 control 
points located approximately in the centers of the sixteen border 
photographs and in the centers of the three remaining photographs 
of the center flight line. 98 additional points were available for 
error analysis. Table 5 lists some of the results, the mean values 
and the root mean square values of the residuals, for all three 
ground coordinates in image scale. With the exception of calibration 
5, all calibrations result in practically the same positional 
accuracy (m^ t 4.2 um, my 7 30570: In addition, calibrations 
2a, 3a and 4b result in approximately the same elevation accuracy 
(m, X 7.9 nm) and the same overall accuracy (ma * 0.7), as do 
calibrations 6 and 7 (m, X 12.9 um, mo^ X 1.1). The difference in 
Table 5 Results from a bundle adjustment of a 5 
by 5 block of 1:5500 aerial photographs 
using different calibration date [15] 
for lens distortion correction. X, Y 
and Z are the mean values of the residu- 
als on 98 check points, my, and m, 
the rms values of these residuals; rp, 
is the maximum distance from the photo- 
graph center of points used in the cali- 
bration; and nec is the number of 
image points corrected with extrapolated 
lens distortion data 
  
  
Calibration 
2a 3a 4b 5 6 7 
m. 0.75 0.62 0.77 3.93 0.98 1423 
X pum] 2.1 -1.2 -1.4 2.7 A dt 0,9 
my — Dum 4.3 4,0 4.3 6,1 4.3 #2 
Y [um] 40,9 «0,5 $0.3 -0,5 -0,8 lu 1 
my [um] 3.6 2.3 3.6 5.6 3.5 3.8 
Z ym]. 4&3 0-7 — 06 EMA TS 71.8 
[Xo.of f1 40,002. —-0,024. -0.037 .-0.076  -D.050 . -0.053 
m; Qum] 6.8 7:6 9,4 16.3 12.5 13,3 
[Xo of f] 0.045 0,050 0.063 0.108 0.083 0,069 
r [mm] 441,4 155,6 152.0 127.5 14S 139 
max 
n 3 0 0 81 3 33 
ecc 
-2.. LS 
"T 
LM MET 
A 
E 
NE 
b 
ET ca