> Ah yes, but Graphical Information Systems are just that - Information
> Systems.

the "G" is for geographical.

> Given that a large percentage of what GIS systems do is interprete and
> extrapolate pure numbers I should hope that this is stored in a database.

no, as a matter of historical fact they were not. most were (and some still
are) file based 3-5 years ago--we GIS practioners love our topology. we gave
it up for a while just to get decent database engine based databases.

> ;o)   Images created from that extrapolated data or interpreted data
placed
> over an image is only the very top layer of what a GIS does.  The User
> Interface if you will, not the entire application layer.

nonsense.  we're storing vector data in databases these days. arcSDE for
example comes with a couple of sql API for manipulating data in the db,
performing spatial searches, etc. i do this for a living.



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