Georeferencing Historical Placenames and Tracking Changes Over Time
Georeferencing WorkshopHarvard University 21 March 2008
Lex Berman China Historical GIS Project
Non-Ambiguous Placenames in GNS [Volz, et al, 2007]
Non-Ambiguous Placenames in CHGIS Gazetteer
Percentages of Non-Ambiguous Placenames - Comparison
instance 1: St. Petersburg (Russia) Begin=1703 End=1913
instance 2: Petrograd (Russia) Begin=1914 End=1923
instance 3: Leningrad (Russia) Begin=1924 End=1990
instance 4: St.Petersburg (Russia) Begin=1991
instance 5: St. Petersburg (Florida, USA) Begin=1892
instance 1,4: St. Petersburg (Russia)
instance 5: St. Petersburg (Florida, USA)
before dissolve
after dissolve
Dissolving multiple historical instances of same spelling
Non-Ambiguous Placenames - Dissolving Temporal Instances
Comparison with Perseus Toponym Disambiguation
Feature Type Thesauri
Feature Type Crosswalks - Building a Concept Lattice
No Standard Method
Semantic Mapping Issues
Feature Type Crosswalk Based on Controlled Vocabulary
Semantic fragmentation = no feasible constraints on concepts
Crosswalk of named periods and chronologies is needed
HEML - Historical Event Markup Language
MIT Simile Project - Timeline
Temporal Fragmentation
Temporal fragmentation = feasible limits and ISO 8601 Standard
China Historical GIS Project
http://www.fas.harvard.edu/~chgis
Georeferencing
Temporal Referencing
Feature type
Toponym string
Time Period
