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Georeferencing Historical Placenames and Tracking Changes Over Time Georeferencing Workshop Harvard University 21 March 2008 Lex Berman China Historical.

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Presentation on theme: "Georeferencing Historical Placenames and Tracking Changes Over Time Georeferencing Workshop Harvard University 21 March 2008 Lex Berman China Historical."— Presentation transcript:

1 Georeferencing Historical Placenames and Tracking Changes Over Time Georeferencing Workshop Harvard University 21 March 2008 Lex Berman China Historical GIS Project

2 Non-Ambiguous Placenames in GNS [Volz, et al, 2007]

3 Non-Ambiguous Placenames in CHGIS Gazetteer

4 Percentages of Non-Ambiguous Placenames - Comparison

5 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

6 Non-Ambiguous Placenames - Dissolving Temporal Instances

7 Comparison with Perseus Toponym Disambiguation

8 Feature Type Thesauri

9 Feature Type Crosswalks - Building a Concept Lattice No Standard Method

10 Semantic Mapping Issues

11 Feature Type Crosswalk Based on Controlled Vocabulary Semantic fragmentation = no feasible constraints on concepts

12 Crosswalk of named periods and chronologies is needed

13 HEML - Historical Event Markup Language

14 MIT Simile Project - Timeline

15 Temporal Fragmentation Temporal fragmentation = feasible limits and ISO 8601 Standard

16 China Historical GIS Project http://www.fas.harvard.edu/~chgis Georeferencing Temporal Referencing Feature type Toponym string Time Period


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