Distributed Mobile Gis

While Distributed Computing Technology, GIS( Geographic Information System), Wireless Mobile Communication Technology, GPS (Global Position System) and Mobile Computing Technology are being improved promptly, Distributed Mobile GIS, DMGIS, presented as a new theory, is under popular discussion now. Whenever, wherever and whoever, which means to provide GIS service to whomever whenever and wherever he is, becomes a fashionable idea shared by those mobile communication and telecom providers. However, there has been no uniform decision about DMGIS architecture, structure and running platform yet. Therefore, to do some research in DMGIS, the most important work is to design a rational and scientific framework hi detail and establish certain essential standard.DMGIS is such a hunge infrastructure that combines advanced technologies of various fields. The thesis organizes and describes its research in the sequence of five-tile architecture as longitude and three structure portions as altitude. In each section, it focuses on several representative problems of DMGIS. In mobile station section, it concentrates on mobile position technology; in wirless communication section, it sets emphases on the algorithm of spatial data wireless transmission;in fixed monitoring center section, map matching and multi-source integration are discussed remarkably.When it comes to Flood Control and Drought Relief, the author provides a "Mobile Vehicle Monitoring System Based on B/S Architecture" instance, which has some simple mobile GIS functions, including: mobile position and tracing, mobile navigation and mobile GIS query.