The Development of mutual utilize system which share GPS camera
Image to make use through the internet
Shinya Suzuki and Yoshiaki Honda and Kiji Kajiwara
Center for Environment Remote sensing center ( CEReS) ,
University of Chiba, Japan
1-33, Yoyoi, Image-ku Chiba 263, Japan
Tel: (81) -43-290-3945 FAX : (81) -43-290-3857
1. Introduction
GPS camera which can automatically record time and geographic information on the film has high utility value for collecting ground truth data. to build the database by using information which recorded on film will lead to development of GPS camera data for study. At the same time, utilization of GPS camera data leads to make standard data. in the other words, increase in these GPS camera image leads a standardization of save format of the GPS camera image and geographic data.
Recently, as the diffusion rate of personal computer increase, world Wide Web ( using internet ) increase. At the same time we are can open and browse data ( document and images ) by using Web sever and internet browser ( ex. Netscape Navigator ) . Moreover development of WWW technology is growing, it has just started to distribute interactive pages in cooperation with Web sever and database management system ( DBMS).
Therefore, in this study, for doing mutual use of resource ( ex. Images taken by GPS camera), it is method to develop network system that available to share GPS camera images by using internet and now we call that system" Global Image Network ( GIN)" .
2. Global Image Network ( GIN) Project
at first thought that it is necessary to gather meta data of GPS camera image in one place for sharing them globally and providing retrieval service. It was for that purpose that we are carrying study ( develop system by using internet ) forward. We call that system " Global Image Network ( GIN)" project. Were are now on the development and when it completes, GIN will contribute to the research activity in the field of Remote sensing and others.
Figure .1 shows three constituent of GIN, Meta data center, Local Data center, GIN user.
Figure 1:
Meta data center is most important center in GIN project, it offers some convenient service. It manage catalogue information (=meta data ) which registered form Local Data center and provide retrieval service thorough the GIN home page on WWW.
Local data center is organization which permitted to register GPS camera image to GIN through internet. Local data center is necessary to be necessary to be authorized by Meta data center. GIN users are users who access to GIN home page through the optional Web browser and get retrieval services.
More detail definitions of each constituent are follows.
A). Meta data center
Meta data center which is center constituent of GIN project is established on computer ( named GIN) in center for Environment Remote sensing Center ( CEReS0. it has main functions as follows.
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Management of Metadata
meta data center manage meta data concerning GPS camera image registered. It has URL of each GPS camera image, but it don't have any image. WWW technology has LINK function ( use URL) . meta data center is able to manage a lot of GPS camera images by using that function, so it doesn't need a mount of hard disk drives volume. We use SQL sever ( Microsoft ) as database.
- Authorization of Local data center.
Meta data center authorize local data center. In the case of authorization request form organization, Meta data center publish local data center account and password after examination.
- Management of registered user
meta data center publish account to registered user ( belong to Local data center ) on GIN home page.
- data search service
meta data center open catalog data ( registered image and data ) on GIN home page, and its offers home page for search data. by means of that, GIN user can search and download GPS camera image.
