All antique maps of Iceland (older than 1900) that are in the collection of the National and University Library of Iceland have been converted to a digital format and are accessible here. The library does not have all maps of Iceland before this date but would like to be able to display them all.
…A short historical description in Icelandic and English is available for every map.
The maps are available in multiple resolutions and the later ones are quite detailed, at the level of navigational charts. Neat stuff, via Plep of course.