
Introduction
The progress of GIS (Geographic Information System) over the past two
decades has been phenomenal. The quantity and quality of research litera-
ture contributed, new applications developed and systems engineered using
GIS are indicators of its growing popularity among researchers, industry and
the user community. Though GIS derives its acronym from Geographic Infor-
mation System, it has emerged as a platform for computing spatio-temporal
data obtained through a heterogeneous array of sensors from Land-Air-Sea
in a continuous time frame. Therefore, GIS can easily be connoted as Spatio-
Temporal Information (STI) system.
The capability of ...