Who doesn’t need t-GIS ?

• Lots of people with mature, sophisticated time-sensitive tools, e.g. Statecharts etc.

• Not everyone needs a t-GIS to do temporal work.

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Must not make the mistake of assuming that because t-GIS is so useful, everyone needs it. There are alternatives, and the more sophisticated handling of time already has (non-spatial) tools which can be annotated with GIS, e.g. Statecharts for network modelling and transportation. In these cases the spatial needs are small and ancillary to the main purpose..

It is an uncontested fact that complex systems, even for “exact entities”, require not just multiple view but multiple core representations which are so different that consistency constraints have to be expressed in code.

Executable object modelling with statecharts, David Harel and Evan Gery, IEEE Computer (July 1997) 31-42.