Web technologies are becoming increasingly useful with new features and the gap to native apps is narrowing. Recently, IndexedDB was added to the web standard to provide large scale storage solutions directly in the browser. Is it performant enough to be used with a spatial database? In this study, such a system is developed for Foran Sverige AB and we learn that IndexedDB indeed can be used for this purpose. Even storage demanding geospatial applications can be developed as a multi- platform system with a single codebase, all while broadening the possible audience reach by avoiding an app installation process.

The work deals with the design of a system foron-line analysis of web page similarity. The system consists of two main parts: A server part, which is based on Java EE and a client part, which works as an extension of a web browser. The master's thesis also solves the communication between these two components and their implementation. There are described two main approaches to the comparison that focus on visual features of the web page. The first approach is based on an analysis of the rendered image of the web page and the second one is based on the source code analysis.