The design and implementation of INGRES
ACM Transactions on Database Systems (TODS)
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
Visual programming: perspectives and approaches
IBM Systems Journal
Visual programming: perspectives and approaches
IBM Systems Journal
An introduction to spatial database systems
The VLDB Journal — The International Journal on Very Large Data Bases - Spatial Database Systems
Spatial SQL: A Query and Presentation Language
IEEE Transactions on Knowledge and Data Engineering
SEE: A Spatial Exploration Environment Based on a Direct-Manipulation Paradigm
IEEE Transactions on Knowledge and Data Engineering
An Object-Oriented Knowledge Representation for Spatial Information
IEEE Transactions on Software Engineering
A Visual Query Language for Graphical Interaction with Schema-Intensive Databases
IEEE Transactions on Knowledge and Data Engineering
User performance under several automated approaches to changing displayed maps
SIGGRAPH '78 Proceedings of the 5th annual conference on Computer graphics and interactive techniques
A pictorial query language for geographical databases
AVI '96 Proceedings of the workshop on Advanced visual interfaces
Effective GIS Mobile Query System
FGIT '09 Proceedings of the 1st International Conference on Future Generation Information Technology
Interaction with geographic information systems via spatial queries
Journal of Visual Languages and Computing
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This paper briefly summarizes the implementation of GEO-OUEL, a special purpose geographic information retrieval and display system. Basically, it is a rather small "front end" to a powerful general purpose relational data base system, INGRES, implemented at Berkeley. Also discussed are the problems that were discovered during the implementation of the original proposal (presented at the 1975 ACM SIGMOD/SIGGRAPH Workshop in Waterloo, Ontario) and the corrective steps taken. Lastly, experiments are described which indicate the performance penalty paid for this "front end" approach and the savings in development time realized.