
Handling intensities 285
16.4.2 An example with GEOSS Clearinghouse
CLH is a geoscience application, which has large numbers of globally
distributed users. It provides functions of both local search and remote search.
By analyzing the access logs, remote search with Open Geospatial Consortium
(OGC) Catalog Service for the Web (CSW) is used by most users. Figure16.3
shows the spatial distribution of the CLH users. There is a strong pattern
where regions with high population densities (e.g., United States, Europe)
have a large number of end users and generate lots of concurrent access.
Figure16.4 shows the user access frequency in Austral ...