Non-current data and geographical information systems A case for data retention

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Abstract
Geographical information systems (GIS)provide rapid access to large volumes of current (up-to-date)data, but what will be the fate of non-current (superceded) data created by continuous updating within these systems? Could any of these latter records be of value to GIS users, either now or in the future? The variety of uses of non-current geographical data is investigated and it is demonstrated that some types of data possess residual value which merit their retention; long after they have ceased to be current. GIS managers should realise that non-current data often remain useful for land management purposes and have untapped market potential.

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