G2 Berman

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G2 Berman

  1. 1. Historical Geodata for Pre-Modern China: Case Study of the CHGIS Project IASSIST - Madison - 28 May 2004 Lex Berman Harvard Yenching Institute
  2. 2. a base GIS of Chinese adminisrative 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
  3. 3. placename feature type coordinates valid date source note spatial objects digital gazetteer GIS layers CHGIS = gazetteer database + GIS layers
  4. 4. 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
  5. 5. Time Series of “historical instances” <ul><ul><li>records can only be added according to strict rules: </li></ul></ul><ul><ul><li>placename change </li></ul></ul><ul><ul><li>type changed </li></ul></ul><ul><ul><li>location changed </li></ul></ul>
  6. 6. gazetteer of named features – vernacular
  7. 7. document gazetteer entries with source notes
  8. 8. classify each entry according to Feature Type
  9. 9. administrative hierarchy = containership Town A Town B Town C County X County Y Prefecture 1 Prefecture 2 Province Z PART OF Table MAIN Table
  10. 10. Sample of CHGIS Part OF Table
  11. 11. Historical map materials - rare before 15 th Cent
  12. 12. Historical gazetteers – date back to 1 st Cent CE
  13. 13. Digitizaton process
  14. 14. current progress
  15. 15. how to use GIS – stacking layers
  16. 16. working with GIS - DEM background
  17. 17. density of settlements in 1911 dataset
  18. 18. simpler maps send a clearer message
  19. 19. extracting records for a specific year
  20. 20. Network model (Fujian 1050 CE)
  21. 21. comparison of changes over time 1050 CE 1250 CE
  22. 22. copy areas of interest to a separate shapefile select area of interest convert to “shapefile”
  23. 23. joining your own data values to CHGIS records 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
  24. 24. working with CHGIS data – thematic mapping create chloropleth map based on your data
  25. 25. Thiessen polgyons generated from points center points + outer boundary Thiessen Polygons based on points aggregation of Thiessen boundaries
  26. 26. county thematic map - sorted by prefecture
  27. 27. population distribution – normalized by area
  28. 28. grain reserves distribution - by raw figures
  29. 29. grain reserves distribution - by area
  30. 30. Thiessen polygons compared with natural features DEM background Male Population (1820) normalized by area
  31. 31. georeferencing temple records, map view
  32. 32. overview of temple locations
  33. 33. density of temples at each location
  34. 34. China Historical GIS Project website: www.fas.harvard.edu/~chgis

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