For quite some time librarians and archivists have been concerned with the long term preservation of all manner of digital objects in their collections. More recently scholars, who have often spent years developing Geographic Information Systems for historical analysis, have come to the realization that the more information technology evolves, the less likely it is that the historical geospatial data which they have painstakingly created will be accessible for many years to come. Further complicating the issue is the multiplicity of data structures that can make up the collection of geospatial information necessary for the instantiation of a map view. While there are currently no permanent solutions to these issues, there are a number of prudent steps that can be taken to preserve such data past the short-term; thus making it more likely that these valuable cultural resources can be migrated in step with advancing technologies well into the future.
Title
The long term preservation of digital historical geospatial data: A review of issues and methods
Clark, J. H. (2016) "The long term preservation of digital historical geospatial data: A review of issues and methods." Journal of Map and Geography Libraries 12 (2): 187-201.