<abstract xmlns="http://www.w3.org/1999/xhtml"><p> This paper deals with uncertainty modeling in spatial object-relational databases by the use of Structured Query Language (SQL). The fundamental principles of uncertainty modeling by fuzzy sets are applied in the area of geographic information systems (GIS) and spatial databases. A spatial database system includes types of spatial data and implements the spatial extension of SQL. The implementation of the principles of fuzzy logic to spatial databases brings an opportunity for the efficient processing of uncertain data, which is important, especially when using various data sources (e.g., multi-criteria decision making (MCDM) on the basis of heterogeneous spatial data resources). The modeling and data processing of uncertainties are presented in relation to the applicable International Organization for Standardization (ISO) standards (standards of the series 19100 Geographic information) and the relevant specifications of the Open Geospatial Consortium (OGC). The fuzzy spatial query approach is applied and tested on a case study with a fundamental database for GIS in Slovakia.</p></abstract>

This paper deals with uncertainty modeling in spatial object-relational databases by the use of Structured Query Language (SQL). The fundamental principles of uncertainty modeling by fuzzy sets are applied in the area of geographic information systems (GIS) and spatial databases. A spatial database system includes types of spatial data and implements the spatial extension of SQL. The implementation of the principles of fuzzy logic to spatial databases brings an opportunity for the efficient processing of uncertain data, which is important, especially when using various data sources (e.g., multi-criteria decision making (MCDM) on the basis of heterogeneous spatial data resources). The modeling and data processing of uncertainties are presented in relation to the applicable International Organization for Standardization (ISO) standards (standards of the series 19100 Geographic information) and the relevant specifications of the Open Geospatial Consortium (OGC). The fuzzy spatial query approach is applied and tested on a case study with a fundamental database for GIS in Slovakia.

Querying Uncertain Data in Geospatial Object-relational Databases Using SQL and Fuzzy Sets

Department of Theoretical Geodesy, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 813 68 Bratislava, Slovak Republic

Slovak Journal of Civil Engineering

This paper deals with uncertainty modeling in spatial object-relational databases by the use of Structured Query Language (SQL). The fundamental principles of...

Querying Uncertain Data in Geospatial Object-relational Databases Using SQL and Fuzzy Sets

Published Online: Jan 29, 2014

Page range: 1 - 12

DOI: https://doi.org/10.2478/sjce-2013-0016

Keywords
Spatial database, SQL, GIS, uncertainty modeling, fuzzy sets

This content is open access.

Querying Uncertain Data in Geospatial Object-relational Databases Using SQL and Fuzzy Sets

Published Online: Jan 29, 2014

Page range: 1 - 12

DOI: https://doi.org/10.2478/sjce-2013-0016

KeywordsSpatial database, SQL, GIS, uncertainty modeling, fuzzy sets

This content is open access.

Keywords
Spatial database, SQL, GIS, uncertainty modeling, fuzzy sets