as base map. 
3. Application 
Figure 6 and 7 show the remote 
control helicopter with GPS 
camera. Figure 8 and 9 show 
pictures from the remote control 
helicopter. These images are very 
useful as ground truth data. This 
helicopter does not need large space 
as taking off and landing 
Therefore, this helicopter system 
can be used wherever. For 
example, from a narrow road, a 
small park and even a small boat. 
65 reflectance data were corrected 
3 at 65 measurement points in 
Figure 2 GPS camera type 3 Mongolia with - GPS. camem 
Images. Therefore it is easy to plot 
each measurement point in map (Figure 10). A 
average reflectance pattern was calculated from 
these data (Figure 11). 
I 
| 
i 
E: 
i 
  
ground truth image database system can use the 
character information of upper part of picture as 
header file using OCR technology (Figure 4). 
Figure 5 shows display of ground truth image 
database system. This system applies digital map 
  
Figure 3 Result of GPS camera 
202 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996