This is an example of a digitisation of two pages from a place-name volume, John Stewart's Shetland Place-Names (1987).
when clicking one of the markers, the name and meaning of the particular name pops up, with a link to a full place-name article.
Clicking the link and takes one to the Hjaltland Network homepage where the full information of the place-name is published.
Some of the references to historical forms are clickable and show the actual sources in which the historical forms occur.