Huang Bo Xu Guanhua Yan Shouyong. The Full Integrated spatial Data Management Based on Extended Relational Data Model[J]. Journal of Remote Sensing, 1997, (1): 69-73. DOI: 10.11834/jrs.19970111.
Data modeling and management are active areas in GIS research This paper presents an integrated data model——extended relational model
which underlies the GIS software—GEODBMS is abased GEODBMS manages spatial data including graphics and attributes through a single relational DBMS Its storage model employs the overlapping quadtree
an improved quadtree
as the spatial index structure to facilitate spatial data querying with an extended SQL GEODBMS’s data management functions ensure secure data access and provide recovery and concurrency control for transactions in multi-user environment