Choose a Logical Data Model

A logical data model describes those parts of the real world that concern your organization. The database may be simple or complex but must fit together in a logical manner so that you can easily retrieve the data you need and efficiently carry out the analysis tasks required.

There are several options available for your system's database design. The advantages and disadvantages of each approach are covered in Thinking About GIS. You should also consider data accuracy, update requirements, error tolerance, and data standards at this stage, as these issues will affect system design.