Abstract
Geographic information systems (GIS) are fundamentally an applied science and although the GIS vendor society provides us with the hardware and software with newer, better, and faster technological tools, it is the domain specialists who apply these tools that define the state of the art. The brain of the GIS still lies in the field and district offices, engineering offices, logging divisions, and offices of small GIS entrepreneurs all of whom apply this technology in their field of work. Although many GIS have been successfully implemented, it is evident that two-dimensional maps with very complex contours and color schema cannot precisely present multidimensional and dynamic spatial phenomena. Generally GIS in use today have not been designed to support multimedia data and therefore have very limited potential due to the large data volumes, very rich semantics, and very different modeling and dispensation requirements. This chapter discusses some of the features of a GIS, the general trends in this field, and the technology behind it. It also describes the advantages of using multimedia to implement GIS, which allows extension of its capabilities to present geographic and other information. Then the main subsystems of GIS are presented. The chapter also identifies some of the key areas where multimedia GIS could be useful.
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