Table 1. Accuracy of adjusted GPS-bundle-blocks 
  
Control cases: c (4 CP) 
a (4 CP + 2 chains of vertical CP) 
b (4 CP + 4 vertical CP + 2 cross—sirips) 
If 
Ucp = Op 1 0pp'S Oyg=Ug8 ,:0¢ps £0; = Op°s (s =_.photo scale number) 
then 
Mey -& 1.0 6 KH, = 150 (c, no drift parameters) 
1.0 Oy 1.6 O9 (a, no drift parameters) 
1.7 Oo 236, (c, drift parameters per block) 
17 Oo 17-09 (a, drift parameters per block) 
2.1 Oo 23-0; (a, drift parameters per strip) 
1.5 Oo 2.06 (b, drift parameters per strip) 
block—size: 6 x 21 photographs 
  
  
  
Considering the high accuracy which kinematic GPS camera 
positioning is capable of providing it can be concluded that 
it is more than sufficient for aerial triangulation / mapping 
with medium or small scale photography. It is not suggested 
to deteriorate intentionally the GPS camera positioning ac- 
curacy as there would hardly be any economic advantage. 
It only means that the accuracy requirements for GPS cam- 
era positioning are not critical at all in those applications. 
Hence, long flight missions and large distances to the station- 
ary receiver, which may be located as convenient as possible, 
seem feasible. 
The theoretical accuracy studies lead to the conclusion that 
GPS aerial triangulation has highly favourable accuracy fea- 
tures and that the practical application is of greatest oper- 
ational and economic interest. It is recalled that theoretical 
accuracy investigations are always somewhat schematic and 
idealized. However, the results are becoming confirmed by 
the few empirical tests which have been carried out, so far. 
There is no doubt that the method is applicable and highly 
effective over the full scale range of photogrammetric aerial 
triangulation for mapping. Its main effect is, in all cases, that 
ground control points are only required for datum transfor- 
mations. Thus their number can be greatly reduced, down 
to very few points per block. In conclusion, the application 
in practice of GPS supported aerial triangulation is highly 
recommended. 
Ceterum censeo disponibilitatem delectam (SA) esse delen- 
dam. 
^ a e ue qum cupa Pe b 
et 
  
700 
No pe No Puy 
— C7