Modeling Geographic Data Using UML

Detailed conceptual models are necessary, when developing systems for geographic information to ensure consistency and integrity. It is well documented in literature that geographic data have special characteristics and call for extensions to standard modeling languages and techniques like the Unified Modeling Language (UML). This paper deals with the geographic data modeling requirements as perceived by the Danish National Survey and Cadastre (KMS) and focuses on spatiotemporal properties and roles of geographic objects. Furthermore a case study is carried out to investigate how previous work within geographic data modeling can handle these requirements.