INFORMATICA Informatica 0868-4952 0868-4952 VU inf16408 10.15388/Informatica.2005.118 Research article ORVPF – the Model and its DNC Implementation Zhou Hong hzhou@sjc.edu Rahimi Shahram rahimi@cs.siu.edu Ahmad Raheel Paprzycki Marcin marcin.paprzycki@swps.edu.pl Wang Yufang ywan2@orca.st.usm.edu Cobb Maria maria.cobb@usm.edu Department of Mathematics, Saint Joseph College, West Hartford, CT 06117, USA Department of Computer Science, University of Southern Illinois, Carbondale, IL 62901-4511, USA Computer Science Institute, Warsaw School of Social Psychology, 03-815 Warsaw, Poland Department of Computer Science and Statistics, University of Southern Mississippi, Hattiesburg, MS 39406, USA 01 01 2005 16 4 603 616 01 10 2004

Vector Product Format (VPF) based databases store geographical data in a relational framework, where individual VPF files are arranged hierarchically in a directory tree structure. Access and update of the VPF data can become difficult due to fragmentation of data among multiple tables. This paper presents an object-oriented model for the management of a VPF database, which provides easy access and automatic update for the VPF data, and is compatible with ESRI ArcView. This model has been successfully implemented in Java, for Digital Nautical Charts (DNC).

 vector product format ORVPF digital nautical charts