the maximum scale showing the all islands. 
(4) Navigation 
Based on the current position of the airplane, this 
function calculates and indicates the bearing and the 
distance up to the next destination that has been input 
in advance. 
Figure 3 shows examples of the navigation information 
map. 
3. THE VIDEO IMAGE DATABASE SYSTEM 
To analyze ocean environment with video images, the 
system that manages video tape images is required. 
This system is designed to manage video images and 
location information collected by the video data 
collection system. 
3.1 System Configuration 
Figure 2 shows the configuration of the video image 
database system. This system is composed of a VTR, 
a personal computer (NEC PC9821Xa) built in a video 
capture board (CANOPUS Power Movie), a video 
computer interface box (SONY VBOX) and a color 
printer (EPSON MJ500C). This system runs on 
Microsoft Windows 3.1. 
3.2 Major Functions 
(1) Management of Video Images 
This function manages video images which should be 
analyzed relating to location information. Furthermore, 
the locations are displayed on a track map. 
(2) Fast Retrieval of Video Images 
This function allows to automatically retrieve and 
display video images from video tapes by selecting a 
location displayed on a track map. The video images 
are retrieved by controlling VTR. 
(3) Print of the Airplane’s track 
This function allows to select and print out the 
airplane’s track. 
(4) Drawing Up of Reports 
This function allows to draw up reports on ocean 
environment with an image and a map. A digital video 
image and a location map automatically are made, 
then inserted into a report form. By only input of 
analysis conclusions into the form, the report is 
complete. Furthermore the completed report can be 
printed. 
4. CONCLUSIONS 
An airborne video system has been developed to 
acquire the real-time information of ocean without 
detailed analysis using multi-spectral scanner. This 
system has been proven to be more effective and 
more accurate than using aerial photographs without 
a GPS when the target of monitoring is long and 
continuous recording of detailed information is 
necessary. Since the location information of the video 
recording is stored together with the corresponding 
images, this system also realizes fast retrieval of 
location information. Besides analysis of the target 
area, the collected video images can also be used in 
generating easy-to-understand multi-media 
presentations for the residents of the monitored area. 
Tests of all the functions of this system have proven 
that it can provide useful information about ocean 
management for ocean administrators. This system is 
also considered to be applicable to the following 
related fields: the survey of Class A rivers, simulation 
and evaluation of river improvement, vegetation plant 
geography, survey of surface soil, soil moisture on 
riverbed, rapids and pool and so on. 
  
(^. PERSONAL COMPUTER N 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
AND 
MONITOR 
VIDEO COMPUTER 
INTERFACE E 
RC 
e 
  
  
  
  
  
  
  
  
VIDEO CAPTURE BOARD 
S-VHS ss tm 
ILS C3 E3Í i 
VTR N. = 
  
COLOR PRINTER 
  
2 
  
Figure 2 Configuration of The Video Image Database System 
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996