1. Modeling Spatio-Temporal Networks with CHGIS Lex Berman 贝明远 CHGIS, Harvard University 2 nd Intl Workshop on Monies, Markets & Finance in East Asia Ruhr-University Bochum 4 – 6 th Oct 2007

2. Funded By: Henry R. Luce Foundation (2001 – 2004) National Endowment for the Humanities (2005 – present)

3. placename admin unit, populated place, natural feature, religious site, archaeological site, trade route, place where an event occurred, etc feature type city, village, mountain, temple, ruin, trade route, etc footprint latitude and longitude for each feature source note citation of data source, commentary on feature valid date date or range of time for which this record is valid core elements of a digital gazetteer

4. placename feature type coordinates valid date source note spatial objects digital gazetteerGIS layers CHGIS = gazetteer database + GIS layers

5. scope: a base GIS of Chinese admin divisions 222 BCE 秦始皇 1911 CE 清宣统 POINT Features: National Capitals Province Capitals Prefecture Capitals County Capitals Towns & Villages POLYGON Features: National & Regime Boundaries Province Boundaries Prefecture Boundaries 1911 County Boundaries

6. Reference layer: 1820 Qing Dynasty

7. Digitization process: maps scanned

8. Digitization process: town points entered

9. Digitization process: boundary entered

10. Comparison of historic map with CHGIS data

11. Example: Shandong 1911 county boundaries

12. Example: Shandong with Town points

13. Currently complete 1911 county boundaries

14. Time Slice data = specific year of validity

15. Data Model Name Change Unit Change Location Change Time Series = instances with ranges of time

16. Time Series in GIS layers

17. Time Series current progress

18. CHGIS – Version 4 datasets

19. Buddhist temple gazetteer sources Da Qing yitongzhi. [Qing National Gazetteer] Yajima, Genryo. Chugoku no ji’in. [Temples of China] Tōhoku Daigaku Fuzoku Toshokan, 1966. [1941]

20. Da Qing yitongzhi (Yitongzhi) page from Yitongzhi

21. Chugoku no ji’in (Yajima Index)

22. Comparison of contents - Yitongzhi & Yajima

23. georeferencing temple records, Yajima sites

24. georeferencing temple records, CHGIS tables

25. georeferencing temple records, map view

26. overview of temple locations

27. density of temples at each location

28. Example: Song tax statistics

29. Example: Mongolian Administration over time

31. Example: distribution of ceramic kilns

32. Associating data values with polygon features select area of interest convert to “shapefile”

33. join new data values to GIS attribute table export attribute data for focus area to TEXT file add a new column to the TEXT file enter new values in the new column, then REJOIN to original GIS focus area shapefile

34. Thematic map based on new data values create chloropleth map based on your data

35. Thiessen polgyons generated from points center points + outer boundary Thiessen Polygons based on points aggregation of Thiessen boundaries

36. population distribution – normalized by area

37. Thiessen polygons compared with natural features DEM backgroundMale Population (1820) normalized by area

38. Mapping and animation of locations over time - Life of Ouyi Zhixu

39. table of events with known dates & table of locations

40. checking and correction of possible locations

41. Addition of paths of movement between locations for each event

42. Animation of points for each event, and paths of movement

43. www.fas.harvard.edu/~chgis photo: Heilongtan, Kunming, Yunnan