(| to 
  
  
  
  
  
  
  
S — 
ded 
air- 
s of 
lese 
rial 
1lv- 
and 
int 
oto 
;he- 
and 
ap- Figure 4: Geocoded SPOT image. 
ing 
iod- 
ons. 
and 
EM 
led 
cale 
rne | 
:od- 
me- 
hich 
Ison 
| 15 
Fig- | Figure 5: MEOSS three-line-scanner ortho-image. Figure 6: Aerial ortho-image. 
| 
o of | TABLE 2 latter displaying settlement and built-up areas in high 
Statistics of geocoding quality control (meters). resolution. As illustrated, RSG enables to map indi- 
vidual subframes directly into existing geocoded im- 
h a ages with high accuracy. The equivalent frame of a 
os Image East North Length topographic 1 : 50 000 map is shown in Figure 8. 
e b: TM RMS 16.8 20.2 26.2 
| MIN -20.7 -44.6 0.8 The geometric quality of the geocoded images was 
ers, MAX 345 35.1 44.8 checked through the measurement of check points in 
eing SPOT RMS 8.4 7.1 11.0 the geocoded image frames. Respective statistical pa- 
| MIN -18.7  -131 1.0 rameters on the resulting discrepancies are summa- 
MAX 9.9 13.0 19.2 rized in Table 2. As can be seen, these parameters in 
| MEOSS-F | RMS 8.9 5.1 10.3 general show a sufficient correspondence to the nom- 
me- MIN  -13.5 -9.1 1.5 inal (a-priori) values given in Table 1. It has to be 
um- MAX 16.6 8.6 16.6 noted, that the geocoding quality statistics of the air- 
ular | AIR-2 RMS 3.9 5.5 6.74 borne images have been evaluated only for the sub- 
1age MIN 29 -0 | 0.3 frames shown in Figures 5 and 6. 
the MAX 91 03 120 
  
  
  
  
  
187