Digital Earth >
The GeoWeb infrastructure offers a number of
advantages over today's state-of-the-art technology. It was
specifically designed as an extremely scalable, open, and global
geographical index to the Web. Below are a few of the key benefits
of this technology.
Open opt-in scheme.
No one company or
instituition can hope to index all geographically related
information for the whole planet. Therefore, the GeoWeb is an opt-in
scheme where any user can register their own data, be it
information about their bed and breakfast, or pictures of their
trip to the Big Island.
Integrate disparate data
Instead of being restricted to one company's
view of the world, the GeoWeb allows users to discover and integrate
disparate sources of information for improved decision making.
Massively scalable architecture.
entire GeoWeb index could be stored on one server, but as
demands and database size grow individual cell servers can be
split off on to additional physical machines. To illustrate the
inherent scalability, there are over 60,000,000 1-minute servers
possible over the land regions of the earth.
No one-server bottleneck.
contemporary search and indexing interfaces require going
through a single point-of-failure server. In the GeoWeb, the client
works out which cell server to contact based on the geographic
extent of the query.
Transparent load balancing.
domain name system (DNS) hierarchy enables transparent load
balancing by moving data to new servers and organizations as
needed. The IP addresses change, and the bandwidth improves, but
the domain names remain the same.
Index any content.
The GeoWeb can index
any content, not just HTML. Movies, sound files, text, 3D
models, terrain, etc. can all be indexed. Content such as HTML
with geographic meta tags allows an easy way to register that
content in the GeoWeb.
imperative to ensure that private data remains private, while
still providing easy access to public information. In addition,
validation and endorsement scheme are proposed to allow
appropriate organizations to stamp content as being
Support high bandwidth
Massive distribution of the geographic database
enables many clients around the world to retrieve data
simultaneously and at high speed.
Reduced server costs.
As the GeoWeb
infrastructure is distributed over many cell servers, there is
no need for a single massive server with huge storage
requirements. The size and speed needed per server is therefore
reduced, for example, divided by 10,000 or more for 1-minute
institutions, or local governments can manage the cell servers
for their region of the world, and also host the cell servers in
the geographic region they represent.
Copyright ©2001 SRI International. All rights reserved.
For more information, please contact: firstname.lastname@example.org.
Last updated: Wednesday, 24-Oct-2001 00:23:05 PDT.