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Towards a Graph of Ancient World Data & an Ecosystem of Gazetteers
1. Pelagios 3
Towards a Graph of Ancient World Data &
an Ecosystem of Gazetteers
Elton Barker @eltonteb
The Open University
Rainer Simon @aboutgeo
Austrian Institute of Technology
Leif Isaksen @leifuss
University of Southampton
July 8, 2014, Lausanne, Switzerland
2. …or any other online resource that bears
a relation to a particular ancient place!
Inscriptions
Texts
Archaeological
Finds
Museum
Objects
Archaeological
Sites
Pelagios | Linking Data, Openly
39 partners from 6 countries
ca. 830.000+ annotations
6. 6
A Brief History of Pelagios | Pelagios 3
2 year project (Sep 2013 – Aug 2015)
Funded by Andrew W. Mellon Foundation
Annotation of geographic documents
predating 1492 (maps and texts)
Traditions
Latin
Greek & Byzantine
Portolan charts & portolanos
Christian Tradition
Islamic Tradition
Chinese Tradition
7. 7
by Romana Klee CC BY-SA 2.0
Growing the Graph | #1 Annotation
Associating Documents with Places.
11. 11
Connecting Gazetteers
Pelagios is a gazetteer user
Pelagios is not a maintainer or aggregator of gazetteers
PS: Should we unify rather than align? We don‘t think so!
Good reasons for diversity! Coverage, granularity, focus, scholarly
quality, community, …
Pelagios 3 defined an RDF profile (or »specification«) for
1. publishing links between places in different gazetteers online
2. publishing minimal place metadata online
So that we search at all!
So that we can make
connections and cross-search.
16. 16
PLACES
INDEX
ITEMS
DB
PELAGIOS API
INGEST & ADMINISTRATION
»indexed units«
are place groups
Unified fulltext search
across both indices
Fuzzy search support
Spatial indexing
Facet support
Items
(referencing places)
Datasets
(containing items)
Annotations
(building the links)
Various aggregation
and lookup tables
(to speed things up)RDF
»Pelagios Annotations«
RDF
Gazetteer Metadata
JSON(P) + CORS HTML
18. 18
API
Keyword search
Items in dataset, sub-items in item
Places per dataset, per item
Temporal profile of dataset
Subsets in dataset
closeMatch-network for place
Datasets per place (with or without closeMatches)
WORK IN PROGRESS!