The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008
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information sharing platform which provides the uniform
entrance of the five service systems. Through the website, users
can enjoy the one step login, convenient data searching,
powerful service function, service and data navigation, and
theme data classification service and so on. The centre database
and data ware house deployed at the information service centre
too. The data ware house based on the centre database and the
databases from four professional data centres which aim at high
level decision-making for the management of land and
resources.
Land data management centre deployed at China Land
Surveying and Planning which take charge of preparing,
processing, maintaining, updating land resources related sharing
data for the five data sharing services according data plan and
data sharing standards and specifications.
Geology and mineral resources data management centre
deployed at China Geological Survey which take charge of
preparing, processing, maintaining, updating Geology and
mineral resources related sharing data for the five data sharing
services according data plan and data sharing standards and
specifications.
Ocean data management centre deployed at State Oceanic
Administration P.R.C which take charge of preparing,
processing, maintaining, updating Ocean resources related
sharing data for the five data sharing services according data
plan and data sharing standards and specifications.
Survey and mapping data management centre deployed at State
Bureau of Surveying and Mapping which take charge of
preparing, processing, maintaining, updating survey and
mapping related sharing data for the five data sharing services
according data plan and data sharing standards and
specifications. 3
3. DATA SHARING SERVICES
The five Data sharing service systems, which are the core of the
information sharing platform, including metadata catalogue
Figure 2 The relationship of the five data sharing services
The metadata catalogue service system which aims at data
searching and finding, through this service, Users can search
and find the metadata of the interested data and can navigate to
other service systems if the interested data is served by the
other services systems.
Spatial data sharing service system based on gridmap
technology satisfy the quick browsing need of spatial data of
users in the net environment which use the technical like
Google Earth, the biggest strongpoint of this service system is
the short response time of spatial data in the Internet due to the
data pre-making mechanism.
The spatial data sharing service system based on WebGIS
technology is another data sharing services system for spatial
data. The spatial data sharing service system based on WebGIS
technology aims at users who want to do some spatial analysis
on line or want to download the spatial data on line. This
services system fully using the WebGIS technology and can
provide rich GIS spatial analyses function but due to the huge
mount of the spatial data transformations; the response time of
this service is long in the Internet. Spatial data sharing service
system based on gridmap technology and The spatial data
sharing service system based on WebGIS together can satisfy
various user need for spatial data.
The non-spatial data sharing service system which providing
non-spatial data service of land and resources. Besides spatial
data, there are plenty of none-spatial data of Land and resources
such as documents, tables, images and videos and so on. The
non-spatial data sharing service system provide users a
convenient way to search and find non-spatial data of Land and
resources online.
The data apply and approve e service system which providing a
means for user to get the off line secret data. Part of data of
Land and Resources are keep secret thus can not been transfer
through the Internet, if users want to get this kind of data,
usually they should go to the data keeper and provide the
