PRELIMINARY NEW SATELLITE DATA RETRIE VAL SYSTEM ON WORLD WIDE WEB 
Keiji Osaki 
Faculty of Engineering, Kyushu Tokai University, Japan 
Commission I, Working Group 6 
KEY WORDS: Archiving, Database, Networks, Satellite, System 
ABSTRACT: 
Preliminary satellite data retrieval system working on WWW(World Wide Web) Internet service was implemented on workstation. 
Thumbnail images of appropriate size were selected and displayed on the window of the WWW browser Netscape. It was checked 
whether the retrieval and expanded time of those thumbnail images could be endured in practical use. The comparison of the time for the 
images to be expanded on the window was also done on various client machines such as SPARC workstation, Power Macintosh and 
Pentium Window personal computers. The results were considered to be fairly acceptable. 
1. INTRODUCTION 
The demand of effective retrieval system for vast satellite data 
has been growing year by year. The browsing system of satel- 
lite data requires much more function such as checking por- 
tion of clouds to the whole satellite image or quality of the 
image. Besides effective use of the retrieval system requires 
excellent graphical user interface and good connectivity to the 
World Wide Web service through Internet. Firstly, let us 
n 
  
make a brief survey of some satellite data retrieval systems o 
  
     
  
  
Figure 1 Dundee satellite pass database clickable map 
150 
WWW until lately. Typical four sites on WWW are intro- 
duced as follows. 
1) Dundee 
www.sat.dundee.ac.uk/bin/pass/) 
satellite pass database 
(http:// 
This database system allows us to search NOAA's quicklooks 
or high-resolution data of all passes they received since 1978 
at Natural Environment Research Council. Clickable map of 
Europe is available as in Figure 1. 
2) CCRS Satellite Imagery Catalogue System (http:// 
   
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Figure 2 CCRS Satellite Imagery Catalogue System 
    
WWW.ccrs.nrcan.gc.ca/gcnet/query/query. e.html) 
Satellite images are various collections of data archived at the 
Canada Centre for Remote Sensing. Items offered by this sys- 
tem are quicklook images, inventory, order desk and satellite 
data user's guide. Quicklook images are presented for 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B1. Vienna 1996 
  
  
LA 
Fig 
SyS 
3)s 
Sat 
Qui 
arc]