4.2.2. Mean square coordinate differences. 
Since the method applied here does not call for a special block adjustment after 
the strip adjusting has been carried out, the mean differences between the geodetic 
coordinates and the values obtained from aerotriangulation (± V®- 1 ) are com 
piled by strips in the table IV. Table V gives the corresponding values for the mean 
differences of the twice determined points at the strip edges. The graphic representations 
show the vectors for the single and twice determined points separated for altitude 
(z) and planimetry (x, y). 
TABLE IV — MEAN SQUARE DIFFERENCES BETWEEN THE GEODETIC COORDINATES OF THE CHECK POINTS AND 
THE COORDINATES OBTAINED FROM AEROTRIANGULATION 
Strip No. 
Number 
of points 
Mean coordinate differences 
dz 
(m) 
dx 
(m) 
dy 
(m) 
1 
32 
± 4.66 
± 3.92 
± 3.68 
2 
36 
± 5.34 
± 5.04 
± 3.83 
3 
26 
± 4.47 
± 4.34 
± 3.46 
4 
45 
± 7.64 
± 7.91 
± 5.25 
5 
42 
± 5.09 
±10.40 
± 4.20 
4’ 
45 
± 4.26 
± 3.32 
± 4.18 
5’ 
42 
± 4.16 
± 4.46 
± 3.02 
6 
28 
± 4.97 
± 3.76 
± 3.52 
7 
39 
± 4.60 
± 3.16 
± 4.39 
8 
40 
± 4.69 
± 4.25 
± 4.20 
TABLE V — MEAN SQUARE COORDINATE DIFFERENCES FOR THE CHECK POINTS WHICH HAVE TWICE BEEN 
DETERMINED IN TWO STRIPS 
Check points 
at the strip 
edges 
Number 
of points 
Mean coordinate differences 
dz 
(m) 
dx 
(m) 
dy 
(m) 
1-2 
11 
± 4.8 
± 3.7 
± 3.9 
2-3 
10 
± 6.3 
± 5.5 
± 3.0 
3-4 
11 
± 3.6 
± 6.2 
± 4.8 
4-5 
9 
± 5.5 
± 9.2 
± 4.7 
5-6 
11 
db 3.7 
± 8.6 
± 3.1 
3-4’ 
11 
± 2.5 
± 2.8 
± 2.6 
4’-5’ 
6 
± 3.3 
± 2.6 
± 4.2 
5’-6 
9 
± 4.5 
± 3.8 
± 3.3 
6-7 
10 
± 4.0 
± 4.2 
± 3.7 
7-8 
12 
± 4.0 
± 2.5 
± 3.6