ABSTRACT
For constructing an information system, several steps must be followed. Starting with the specifications, the first key step is to model the organisation and its context. For that we need a design methodology and the scope of this chapter will be to offer some methods for such a task. This chapter will give all elements for designing conceptual models as a key stage in urban information system building. The relational and object-oriented database models will be presented, together with methodologies to design them. Several small examples taken from different applications in urban planning will conclude this chapter.
