Plans, maps and technical documents exist in up to A0 size paper plans and CAD (Computer Aided Design) files.
Genus has a Large Format division that can help you to copy, scan, plot and print your engineering drawings, by supplying and maintaining Large Format copiers, scanners, folders and plotters.
For digital preservation CAD files can be written directly from their original digital format to 500 year life 35mm microfilm and aperture cards. These microforms (either newly created or existing) can be scanned back into digital format using the state of the art on-demand and production microfilm scanners available from Genus.