Next: About this document

CoGIS: A Cooperative Geographical Information System

Wesley W. Chu, Hua Yang, Kuorong Chiang, Berthier Ribeiro, Gladys Chow
Computer Science Department
University of California at Los Angeles
Los Angeles, CA 90024


Knowledge-based cooperative query answering facilities have been introduced to the GIS for approximate query answering. We use context-sensitive spatial type abstraction hierarchies to provide such cooperative capabilities. As a result, the ranges of the approximate spatial operators can be automatically determined by STAHs, rather than specified by domain experts. Thus these operators are context-sensitive. Further, STAHs can be generated automatically from geographic databases and thus is scalable. A prototype system - CoGIS - has been implemented to incorporate these cooperative capabilities.

View the Paper (requiring a postscript viewer)
Tue Jun 21 15:43:02 PDT 1994