Yoon-Seop Chang

XML Web Service‐based development model for Internet GIS applications

Most of the current Internet Geographic Information System (GIS) applications cannot be shared and are not interoperable because of their heterogeneous environments. With the growth of Internet GIS, many difficulties have occurred in integrating GIS components because of their diversity. The main objective of this study is to suggest a new development model for dynamic and interoperable Internet GIS applications. The model is based mainly on the dynamic integration of Internet GIS components by applying Extensible Markup Language (XML), XML Web Service, Geography Markup Language (GML), and Scalable Vector Graphics (SVG), etc. The relevant technologies of Internet GIS were reviewed thoroughly, and then a new model was designed. During the design of the new model, typical examples of GIS Web Service components were suggested, together with practical structures for applications using these components. Six examples of components and four types of applications were suggested, and they were experimentally implemented for model validation and improvement. The suggested model and components will enable easier and more rapid development of Internet GIS applications through the dynamic integration of distributed GIS components. Users will be able to avoid redundancy and consequently reduce both cost and time during each GIS project.

Study on mobile mashup webapp development tools for different devices and user groups

Tools for mobile mashup development need to be differentiated considering both of experts and common users. Appropriate tools are also necessary for each environment of PCs and mobile devices. This study deals with issues on easier development environment for mobile mashups. The design of a new development system was proposed and has been implemented successfully. The system provides development tools on PCs, mobile pads and smartphones for both of experts and common users. The system and its tools were designed differentiating the roles of experts and common users for block creation, so common users can easily make webapps using various blocks. UI-based mashup development methods were adopted together with workflow-based methods, so it is more intuitive for common users to understand mashup procedures. As a result, users can make a number of useful mobile webapps using the system.