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Informix, Inc. 3D Spatial DataBlade Guide. March 1995.

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Security Considerations for a Distributed Location Service - Leonhardt, Magee (1998)   (9 citations)  (Correct)

....a location service with access control mechanisms as described in section 7. As prototyping platform we have used a commercial object relational database management system with a plug in for three dimensional spatial data types and operations (Informix Illustra [4] with 3D Spatial DataBlade [5]) Our prototype allows for real time data feed of symbolic location sightings (provided by Active Badges, and the UNIX ruser service) and geometric sightings from GPS receivers. The database supports queries to located objects and to locations via SQL and a Web based front end. The hierarchic ....

Informix, Inc. 3D Spatial DataBlade Guide. March 1995.


Multi-Sensor Location Tracking - Leonhardt (1998)   (4 citations)  (Correct)

....a formal location model which would explicitly represent the knowledge necessary for a fusion algorithm. We implemented our semi symbolic hierarchical location model as a database schema within an object relational database (Informix Illustra [3] with an extension module for spatial processing [2]) Effectively, we treated the location service as a specialised database. While this helped us to verify our location model and the processing model, we also encountered some challenging performance problems. These were mostly occurring during recursive processing over the location hierarchy. ....

Informix, Inc. 3D Spatial DataBlade Guide, March 1995.

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