Skip to main content

Research Article: An object model with parametric polymorphism for dynamic segmentation

Buy Article:

$60.90 plus tax (Refund Policy)


Dynamic segmentation is commonly viewed as one of the most effective aspects of GIS for transportation applications. To date, much of this effort has focused on relational data models, with object data models receiving far less attention. This paper presents an object model that provides a natural representation of dynamically segmented features by extending the Object Database Management Group (ODMG) standard with a special mechanism, called parametric polymorphism. This mechanism supports the shifting of a conventional data type into a linear type to maintain knowledge about events (e.g. pavement condition, traffic volumes and traffic accidents) that change spatially along linear features. An associated object query language unavailable in current GIS packages is also provided for data analyses relevant to dynamic segmentation. The model and query language have been implemented using an object-oriented scripting language in a GIS environment.

Document Type: Research Article


Affiliations: Department of Civil Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260; e-mail:

Publication date: April 1, 2003

More about this publication?

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more