Semantic database modeling: survey, applications, and research issues
ACM Computing Surveys (CSUR)
Implicitization of rational parametric equations
Journal of Symbolic Computation
Algebraic 3-D modeling
Data models and query languages for spatial databases
Data & Knowledge Engineering - Special jubilee issue: DKE 25
Entity-Relationship Modeling: Foundations of Database Technology
Entity-Relationship Modeling: Foundations of Database Technology
Spatial Databases, The Final Frontier
ICDT '95 Proceedings of the 5th International Conference on Database Theory
Source Description-Based Approach for the Modeling of Spatial Information Integration
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
Modeling Topological Constraints in Spatial Part-Whole Relationships
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
Topological Relationships of Complex Points and Complex Regions
ER '01 Proceedings of the 20th International Conference on Conceptual Modeling: Conceptual Modeling
Spatial Pictogram Enhanced Conceptual Data Models and Their Translation to Logical Data Models
ISD '99 Selected Papers from the International Workshop on Integrated Spatial Databases, Digital Inages and GIS
Curves and Surfaces for Computer Graphics
Curves and Surfaces for Computer Graphics
Encyclopedia of GIS
SQLST: a spatio-temporal data model and query language
ER'00 Proceedings of the 19th international conference on Conceptual modeling
Collection type constructors in entity-relationship modeling
ER'07 Proceedings of the 26th international conference on Conceptual modeling
Towards a semantic spatial model for pedestrian indoor navigation
ER'07 Proceedings of the 2007 conference on Advances in conceptual modeling: foundations and applications
PLR partitions: a conceptual model of maps
ER'07 Proceedings of the 2007 conference on Advances in conceptual modeling: foundations and applications
Map algebra extended with functors for temporal data
ER'05 Proceedings of the 24th international conference on Perspectives in Conceptual Modeling
A refined line-line spatial relationship model for spatial conflict detection
ER'05 Proceedings of the 24th international conference on Perspectives in Conceptual Modeling
Ontology-based agri-environmental planning for whole farm plans
ER'10 Proceedings of the 2010 international conference on Advances in conceptual modeling: applications and challenges
Transforming geometrically enhanced conceptual model schemas to GML
Conceptual Modelling and Its Theoretical Foundations
Complete Conceptual Schema Algebras
Fundamenta Informaticae
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Motivated among others by the need to support spatial modelling for the sustainable land use initiative we present a geometrically enhanced ER model (GERM), which preserves the key principles of ER modelling and at the same time introduces bulk constructions and types that support geometric objects. The model distinguishes between a syntactic level of types and an explicit internal level, in which types give rise to polyhedra that are defined by algebraic varieties. It further emphasises the stability of algebraic operations by means of a natural modelling algebra that extends the usual Boolean operations on point sets.