THE CONCEPT OF WEB-BASED SPATIAL DECISION SUPPORT SYSTEM FOR ACCESSIBILITY ANALYSIS
This paper describes the concept of spatial decision support system (SDSS), which combines network analysis and spatial analysis of accessibility with a web-based map service. There are two main objectives of this research: (1) to assess spatial variation of accessibility to certain services within the city area based on network analysis and (2) to share this knowledge with potential users (citizens) in the form of a web-based SDSS. Such system can help people take better decisions regarding location and accessibility (e.g. by answering such question as: which part of the city has good access to primary schools and parks?). Such questions involve multi-criteria spatial analysis. This article focuses mainly on concepts and theory behind the second objective, as it is achieved with the help of open source solutions. An open-source web-based spatial decision support system is proposed. It is based on GeoServer, which is used as a main data provider. The data is exposed as a WMS service. The web user interface is built using ExtJS and GeoExt frameworks with OpenLayers as a main map client. Finally, dynamic Styled Layer Descriptor (SLD), generated on the client side is incorporated for creating interactive and user-oriented maps.
Jan Burdziej - Nicolaus Copernicus University