Modeling Spatio-Temporal Networks with CHGIS

1
Modeling Spatio-Temporal Networks with CHGIS
Lex Berman ??? CHGIS, Harvard University
2nd Intl Workshop on Monies, Markets Finance in
East Asia Ruhr-University Bochum 4 6th Oct
2007
2
Funded By Henry R. Luce Foundation
(2001 2004) National Endowment for the
Humanities (2005 present)
3
admin unit, populated place, natural feature,
religious site, archaeological site, trade route,
place where an event occurred, etc
placename
feature type
city, village, mountain, temple, ruin, trade
route, etc
footprint
latitude and longitude for each feature
valid date
date or range of time for which this record is
valid
source note
citation of data source, commentary on feature
core elements of a digital gazetteer
4
digital gazetteer
GIS layers
placename feature type coordinates valid
date source note
spatial objects
CHGIS gazetteer database GIS layers
5
???
???
222 BCE
1911 CE
POINT Features National Capitals Province
Capitals Prefecture Capitals County
Capitals Towns Villages POLYGON
Features National Regime Boundaries Province
Boundaries Prefecture Boundaries 1911 County
Boundaries
scope a base GIS of Chinese admin divisions
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
Da Qing yitongzhi. Qing National Gazetteer
Yajima, Genryo. Chugoku no jiin. Temples of
China Tohoku Daigaku Fuzoku Toshokan , 1966.
1941
Buddhist temple gazetteer sources
20
page from Yitongzhi
Da Qing yitongzhi (Yitongzhi)
21
Chugoku no jiin (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
30
(No Transcript)
31
Example distribution of ceramic kilns
32
select area of interest
convert to shapefile
Associating data values with polygon features
33
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
join new data values to GIS attribute table
34
create chloropleth map based on your data
Thematic map based on new data values
35
center points outer boundary
aggregation of Thiessen boundaries
Thiessen Polygons based on points
Thiessen polgyons generated from points
36
population distribution normalized by area
37
DEM background
Male Population (1820) normalized by area
Thiessen polygons compared with natural features
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