Creating an interactive videodisc on mapping

The interactive cartography videodisc includes a double‐sided videodisc with one side containing full map images of over 600 maps and in excess of 30,000 tiles and close‐up pieces of these maps. The database contains a wide assortment of map information and will be approximately eight megabytes in size. Not only does the database provide information about each map but a user can search fields in the database to isolate those maps that fit the intended criteria. The interface (approximately two megabytes) provides the link between the images and the data. It is designed to allow a high level of interaction and access through display environments. A printed directory is also being prepared with three indexes organized alphabetically by map title, subject, and region.