Modeling GIS data using OMEGA

Chiang Lee, Shyh Chin Wang

Research output: Contribution to journalArticle

Abstract

Object-oriented (O-O) data models are known for their rich semantics and modeling power for representing complex data. It is also generally agreed that O-O models can provide more functionalities and semantic constructs for modeling data in applications of geographic information systems (GIS). However, there is a lack of a complete understanding of how to apply O-O concepts in modeling GIS data. In this paper, we propose an object-oriented data model called OMEGA which is designed especially for GIS applications. We discuss in the model the use of O-O concepts in characterizing GIS applications. This model distinguishes geographic data into three major types: geometric objects, geographic objects, and relationship objects. Each of these types of objects is modeled by distinct and proprietary type hierarchies. In the core OMEGA model, there are five semantic association types: generalization, aggregation, (spatial) relationship, geographic constituent set (GCS), and selective aggregation (SA). The major enhancements that have been added to the model include (1) separating of relationships between objects from the object class and grouping of relationships of the same type into a relationship class; these classes can have aggregation as well as generalization associations; (2) a proposed unique set construct, called a geographic constituent set (GCS), especially for modeling of GIS data; and, (3) a proposed selective aggregation (SA) construct which is used to resolve overrefinement problems in a generalization hierarchy. Properties associated with these new constructs are also presented.

Original languageEnglish
Pages (from-to)345-364
Number of pages20
JournalJournal of Information Science and Engineering
Volume12
Issue number3
Publication statusPublished - 1996 Sep 1

Fingerprint

Geographic information systems
information system
Agglomeration
aggregation
Data structures
Semantics
semantics
grouping
functionality
lack

All Science Journal Classification (ASJC) codes

  • Software
  • Human-Computer Interaction
  • Hardware and Architecture
  • Library and Information Sciences
  • Computational Theory and Mathematics

Cite this

Lee, Chiang ; Wang, Shyh Chin. / Modeling GIS data using OMEGA. In: Journal of Information Science and Engineering. 1996 ; Vol. 12, No. 3. pp. 345-364.
@article{7112a77a8d5c4c72813c11cb937b9701,
title = "Modeling GIS data using OMEGA",
abstract = "Object-oriented (O-O) data models are known for their rich semantics and modeling power for representing complex data. It is also generally agreed that O-O models can provide more functionalities and semantic constructs for modeling data in applications of geographic information systems (GIS). However, there is a lack of a complete understanding of how to apply O-O concepts in modeling GIS data. In this paper, we propose an object-oriented data model called OMEGA which is designed especially for GIS applications. We discuss in the model the use of O-O concepts in characterizing GIS applications. This model distinguishes geographic data into three major types: geometric objects, geographic objects, and relationship objects. Each of these types of objects is modeled by distinct and proprietary type hierarchies. In the core OMEGA model, there are five semantic association types: generalization, aggregation, (spatial) relationship, geographic constituent set (GCS), and selective aggregation (SA). The major enhancements that have been added to the model include (1) separating of relationships between objects from the object class and grouping of relationships of the same type into a relationship class; these classes can have aggregation as well as generalization associations; (2) a proposed unique set construct, called a geographic constituent set (GCS), especially for modeling of GIS data; and, (3) a proposed selective aggregation (SA) construct which is used to resolve overrefinement problems in a generalization hierarchy. Properties associated with these new constructs are also presented.",
author = "Chiang Lee and Wang, {Shyh Chin}",
year = "1996",
month = "9",
day = "1",
language = "English",
volume = "12",
pages = "345--364",
journal = "Journal of Information Science and Engineering",
issn = "1016-2364",
publisher = "Institute of Information Science",
number = "3",

}

Modeling GIS data using OMEGA. / Lee, Chiang; Wang, Shyh Chin.

In: Journal of Information Science and Engineering, Vol. 12, No. 3, 01.09.1996, p. 345-364.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Modeling GIS data using OMEGA

AU - Lee, Chiang

AU - Wang, Shyh Chin

PY - 1996/9/1

Y1 - 1996/9/1

N2 - Object-oriented (O-O) data models are known for their rich semantics and modeling power for representing complex data. It is also generally agreed that O-O models can provide more functionalities and semantic constructs for modeling data in applications of geographic information systems (GIS). However, there is a lack of a complete understanding of how to apply O-O concepts in modeling GIS data. In this paper, we propose an object-oriented data model called OMEGA which is designed especially for GIS applications. We discuss in the model the use of O-O concepts in characterizing GIS applications. This model distinguishes geographic data into three major types: geometric objects, geographic objects, and relationship objects. Each of these types of objects is modeled by distinct and proprietary type hierarchies. In the core OMEGA model, there are five semantic association types: generalization, aggregation, (spatial) relationship, geographic constituent set (GCS), and selective aggregation (SA). The major enhancements that have been added to the model include (1) separating of relationships between objects from the object class and grouping of relationships of the same type into a relationship class; these classes can have aggregation as well as generalization associations; (2) a proposed unique set construct, called a geographic constituent set (GCS), especially for modeling of GIS data; and, (3) a proposed selective aggregation (SA) construct which is used to resolve overrefinement problems in a generalization hierarchy. Properties associated with these new constructs are also presented.

AB - Object-oriented (O-O) data models are known for their rich semantics and modeling power for representing complex data. It is also generally agreed that O-O models can provide more functionalities and semantic constructs for modeling data in applications of geographic information systems (GIS). However, there is a lack of a complete understanding of how to apply O-O concepts in modeling GIS data. In this paper, we propose an object-oriented data model called OMEGA which is designed especially for GIS applications. We discuss in the model the use of O-O concepts in characterizing GIS applications. This model distinguishes geographic data into three major types: geometric objects, geographic objects, and relationship objects. Each of these types of objects is modeled by distinct and proprietary type hierarchies. In the core OMEGA model, there are five semantic association types: generalization, aggregation, (spatial) relationship, geographic constituent set (GCS), and selective aggregation (SA). The major enhancements that have been added to the model include (1) separating of relationships between objects from the object class and grouping of relationships of the same type into a relationship class; these classes can have aggregation as well as generalization associations; (2) a proposed unique set construct, called a geographic constituent set (GCS), especially for modeling of GIS data; and, (3) a proposed selective aggregation (SA) construct which is used to resolve overrefinement problems in a generalization hierarchy. Properties associated with these new constructs are also presented.

UR - http://www.scopus.com/inward/record.url?scp=6044244597&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=6044244597&partnerID=8YFLogxK

M3 - Article

VL - 12

SP - 345

EP - 364

JO - Journal of Information Science and Engineering

JF - Journal of Information Science and Engineering

SN - 1016-2364

IS - 3

ER -