A brief overview of the named entities feature in Beyond Translation.
Already in the 1990s, David A. Smith at Perseus implemented dynamic maps of places referenced in particular works but those links were generated automatically. A great of work has gone into creating a gazetteer for the Ancient World (the Pleiades Gazetteer) and into helping users link references to places in particular text with entries in that Gazetter (e.g., Recogito). Josh Kemp of Furman University used Recogito to annotate named entities in the Greek text of the Odyssey (which a discussion of his work here). We hope to do a great deal also with the annotations on English translations in ToposText (for an example produced by the Tufts Datalab, see here).
See this in Perseus 6.0 here.