The State of the Art of Map-Based Mobile Services -- Decluttering of Icons Based on Aggregation in Mobile Maps -- User-Centered Design of Landmark Visualizations -- An Incremental Strategy for Fast Transmission of Multi-Resolution Data in a Mobile System -- Evaluating the Effectiveness of Non-Realistic 3D Maps for Navigation with Mobile Devices -- Context-Aware Applications Enhanced with Commonsense Spatial Reasoning -- Personalising Map Feature Content for Mobile Map Users -- A Survey of Multimodal Interfaces for Mobile Mapping Applications -- User Interaction in Mobile Navigation Applications -- Designing Interactions for Navigation in 3D Mobile Maps -- PDA-Assisted Indoor-Navigation with Imprecise Positioning: Results of a Desktop Usability Study -- Accuracy and Performance Assessment of a Window-Based Heuristic Algorithm for Real-Time Routing in Map-Based Mobile Applications -- How Mobile Maps Cooperate with Existing Navigational Infrastructure -- Geographical Data in Mobile Applications Uses beyond Map Making -- Mobile Location-Based Gaming -- Mobile Maps and More - Extending Location-Based Services with Multi-Criteria Decision Analysis. The worldwide popularisation of mobile communication technologies and the incre- ing awareness of usability issues since 1990's have been urging map designers to s- cialise and extend cartographic semiotics, visualisation styles and map use techniques for mobile contexts and small display devices. As a follow-up to the first book "M- based Mobile Services - Theories, Methods and Implementations" published in 2005, this new one is devoted to design strategies, user interactions and usability issues. It addresses methods and techniques for topics that range from design and rendering, context modelling, personalisation, multimodal interaction to usability test. Instead of striving for a seamless coverage of all essential theoretical and technical issues with an equal depth and extent, we attempt to pinpoint a number of research highlights and representative development activities at universities, research institutions and so- ware industry. The operational prototypes and platforms reported in the book are on the one hand outcome and feasibility proof of various approaches. On the other hand, they serve as a new starting point for the refinement of user interfaces and iterative usability tests. The book is intended not only for cartographers, surveying engineers and g- information scientists engaged in the development of location-based services, but also for software engineers and cognitive scientists working with interface design and - ability assessment. In addition, we try to provide a number of real-life case studies for students, academics and practitioners from GIS, computer graphics and other relevant disciplines.