ABSTRACT
This chapter first reviews how time can be represented and incorporated into modelling spatial processes that vary with time. Following a brief overview of time and its expression, the chapter articulates the relationship between time, space, and attribute, as well as temporal aggregation. Next, the chapter compares possible means or models by which the spatial and temporal components of all entities can be represented in a geographic information system database, including their organisation for efficient data retrieval during spatial modelling. The chapter then addresses how to represent and handle time in spatial-temporal analysis, and describes three types of time-explicit spatiotemporal models in detail, of which some are for temporal modelling onlywhile the spatial component is missing. The chapter ends with a discussion of how to visualise spatiotemporal processes. The strengths and drawbacks of three methods (simple display, animation, and simulation) are evaluated and compared.
