Elliott, T. & and Gillies, S. (2009). Digital geography and the classics. Digital Humanities Quarterly, 3(1).
The authors here discuss the brief history of digital geographic data in use by humanities studies (specifically classics) through pivotal scholarly projects, ending in a discussion of future possibilities for geographic or spatial data as well as their own Pleiades project.
Certainly spatial information has lagged behind HTML documents in their general findability, but as the authors point out the gap is closing: Googlebot began indexing web documents encoded in the Keyhole Markup Language (KML) along with feeds containing GeoRSS markup in late 2006; Microsoft has added support to its Local Search and Virtual Earth services for similar data in late 2007. In general KML and GeoRSS resources, if properly marked up in an indexable web page, will be discoverable.
Typically the actual coordinates of some spatial resource is extracted from an external dataset (examples: Getty Thesaurus of Geographic Names, GeoNames database, Alexandria Digital Library Gazetteer) based on the name. This can naturally lead to erroneous information on account of name ambiguity (names changing through time, coordinates changing through time, etc.). The authors believe that over time such misjudgments will be minimized through sophisticated name-variant databases as well as automated best-guesses algorithms, like examining other geographic points in an article to determine the likely coordinates of a single ambiguous place name. This is mass auto-extraction of metadata is similar to our discussion of Google Books metadata problems, with a similar refinement-over-time solution.
The authors examine the beginnings of maps and spatial data on the web, charting a path from the earliest server-side applications to heterogenous, continuous-panning, browser-side interfaces that pull data and overlays from multiple resources. I cannot help but look at the battle maps in my group’s chosen digital archive, The Valley of the Shadow, and see that these geographic resources fall into the earlier paradigm. While the interface allows the user to apply a set number of overlays to the unfolding battle animations, the application itself is closed off from other web resources: there are no coordinates, no historical geographic or topological data, etc., available, and there is no way to see such information except by requesting the programmers to add it.
The authors also distinguish between large top-down geo-historical projects like the National Geospatial Digital Archive (US) and Global Spatial Data Infrastructure Association and smaller, “hand-crafted” datasets created by dispersed volunteered geographic information (VGI). The latter, they argue, is quickly eclipsing the achievements of the former. VGI datasets have become more prominent on account of a rise in web applications that can easily publish such information. These applications are increasingly adopting metadata standards, and collaborative projects are arising that address interoperable issues in geo-spatial data like the Register of Geographic Entities (RAGE).
Last the authors discuss their own Pleiades Project. This attempts to establish a standard reference dataset for Classical geography. Most interesting here is their rejection of coordinates and toponyms as the primary organizing theme for geo-historical data, using instead the concepts of place, “understood as a bundle of associations between attested names and measured (or estimated) locations (including areas).” I think this is a really great innovation: it moves away from a more scientific, exacting sense of place (coordinates) to a more humanly and historically meaningful sense of place, one that has the advantage of being more easily discussed and contested in a collaborative environment. Certainly the computer will need to understand something like the Roman Empire in terms of coordinates, but a layer of abstraction (locations and areas) is extremely useful when humans need to play with such data.
