1. Using Federated Catalogs to Improve Semantic Integration among Spatial Data Infrastructures.
- Author
-
de Andrade, Fabio Gomes, Baptista, Cláudio de Souza, and Leite Jr, Fabio Luiz
- Subjects
- *
SPATIAL data infrastructures , *GOVERNMENT agencies , *GEOSPATIAL data , *ARCHITECTURE , *RESEARCH - Abstract
Nowadays, Spatial Data Infrastructures (SDIs) play an important role in government agencies, at different levels: global, national, and local. They aim to improve the management and sharing of geospatial data. Nonetheless, these SDIs have been developed as information islands, in which a user's query is compared to metadata described only in their own catalog services. The lack of interaction among SDIs limits the potential of these infrastructures in providing geospatial data to a larger audience. This article presents a distributed architecture, based on a federation of SDIs which interact among themselves, using query propagation. This propagation facilitates data discovery and sharing. We also describe a distributed query processing service used to enable the resource discovery in distributed infrastructures. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF