This paper is concerned with the problems and solutions to reliable analysi
s of arbitrary datasets. Our approach is to describe components of a system
called the GARP Modelling System (CMS) which we have developed for automat
ing predictive spatial modelling of the distribution of species of plants a
nd animals. The essence of the system is an underlying generic spatial mode
lling method which filters out potential sources of errors. The approach is
generally applicable however, as the statistical problems arising in arbit
rary spatial data analysis potentially apply to any domain. For ease of dev
elopment, GMS is integrated with the facilities of existing database and vi
sualization tools, and Internet browsers. The GMS is an example of a class
of application which has been very successful for providing spatial data an
alysis in a simple to use way via the Internet.