The rapid growth of ubiquitous mobile geographic information science has been enabled by expanding wireless coverage, more accurate positioning technologies, and the widespread adoption of mobile devices. This book presents the new inside-out model of GIS to implement WAP and J2ME modes for ubiquitous mobile geographic information services. After a general overview of GIS, the author explains the technical architecture of the ubiquitous geographic information services system. Providing user requirements, system design, and a prototype, the system integration infrastructure is then proposed. The text concludes with a summary of the pervasive computing environment and a discussion of expanding global grids.