State Of The Map 2012 The 6th Annual International OpenStreetMap Conference Tokyo, Japan, September 6th – 8th, 2012, Yuichiro Nishimura, OpenStreetMap and the heavy rainfall disaster in the mountainous area of Nara, Japan, 11:00am -11:20am,Thursday, September 6th, 2012 http://www.stateofthemap.org/schedule/thursday/

1. OpenStreetMap and the
heavy rainfall disaster in
the mountainous area of
Nara, Japan
Yuichiro Nishimura*, Nara Women's University
State Of The Map 2012
session: Disaster Relief I
09/06/2012 at 11:00 AM

2. my OSM C.V.
SotM Venue
OSM Kansai
Kyoto
Osaka Nara
• OpenStreetMapper in Kansai
community (from Oct. 2010) and
OSMFJ member
© OpenStreetMap contributors, CC-BY-SA

3. my OSM C.V.
• Human Geographer
• interests: GIS and society
• Education activity: OpenStreetMap in Nara Women's
university
• 2nd day(2:00pm -2:20pm) small Panel Discussion:
State of the university/school GIS education using
OpenStreetMap

4. movie

5. heavy rainfall disaster occurred in
the mountainous area of Nara,
September 2011
• The heavy rainfall
disaster occurred in
Kii Peninsular,
September 2011 has
brought severe
damage in the
mountainous area of
Nara Pref.
• Tropical Storm Talas
(2011)
http://en.wikipedia.org/wiki/
File:Talas_Terra_MODIS_picture_2011-09-02_(High_Definition).jpg

6. Totsukawa
• It takes more than 4.5 hours
Nara City
between Totsukawa village
(Nara Pref.) and Nara city
by public transport (the
distance is about 125km).
• The largest village in Japan in
terms of land area(The total
area is 672.35 km²
population:3,930,(2012))
• several serious damage by Totsukawa
heavy rain fall disasters
• The huge disaster in
Meiji-Era (1889) leads the
migration to Hokkaido
(to Shin-Totsukawa)
© OpenStreetMap contributors, CC-BY-SA

7. • The heavy rain falls from Talas triggered
huge landslides in the village
• 73 people died and 20 more are still
missing
• The landslides occured on Sep. 3rd. in
Totsukawa
• The main roads also damaged by the
landslide and outsider cannot enter the
village over several months

8. crisis mapping
• The state of the crisis mapping in
Totsukawa will be shown
• The imported data, traced data are
mainly used on the crisis mapping
• The limitation of such data leads
the need of the field survey

9. crisis mapping
• crisis mapping by most active OpenStreetMappers in Japan.
• Thanks for mapping!!
• Most of data mapped from 9th-13th Sep. 2011.

10. maps of Japanese mountainous
area
• relatively low quality by Google Maps
– Google Japan uses zoomed map data by Zenrin
10
residential map mainly focused on the urban area.

11. making map
• Yahoo! Japan/Alps: way
data (imported in 20th,
Aug. 2011)
• Bing satellite image
(trace)
– mainly Coastal area
(Shingu to Kushimoto)
– no good resolution
data in Totsukawa
• GSI base map
1:25,000(WMS trace) 11

12. Bing image recently updated
We can use high resolution
image now
(Though it is cloudy) 12

13. • The problems of scale -> the need of the field surveys
– GSI base map 1:25,000(WMS trace)
• sometimes the buildings and ways are omitted 13

14. • small roads 14

15. • suspension
bridge
• connection road
15

16. • evacuation houses
• shops/bank
• hotspring stand!!
16

17. disaster portal using crowdmap
(https://totsukawa.crowdmap.com/)

18. distribution of the reports

19. Sep. 11th: release of
totsukawa.crowdmap.com
• crowdmap instance by Higa4 (OSMFJ)
• checked tweet: #totsukawa, #十津川
• The potential and limitation of the crowdmap
is discussed at the OSM community in Japan
– making good quality of the map before the
disaster
– roads and the communication line(telephone,
internet, mobilephone) in the village had the
damages
• the methods for supporting the local resident
• the difficulty of the field survey
19

20. Portal for
recovery by
Nara Pref.
(Sep. 2012)
• recovery
planning
• progress of
plan
• recovery
mapping
recovery mapping
• recovery
information
• supporting
information
http://www3.pref.nara.jp/fukkou/

21. using GIS

22. jpeg image
only

23. Kumano Kodo
• ancient religious
roads
• world heritage
• The mapping for
tourism
• The mapping for
disaster education
• ancient road and
settlements
located at not
the small flatland
near the river
but the
mountain ridge

24. further issues
• supporting OSM community building in the
village (the practices by the outsider of the
damaged area)
• publicity of OSM is needed (Google maps have
dominant position in Japan). The potential of
OSM in mountainous area in Japan is not well
known.
• field surveys by local resident is needed for
keeping the data quality.

25. End.
please ask to
nissyyu (OSM account)
nissy_yu@nara-wu.ac.jp
@nissyyu (twitter)
http://www.facebook.com/
yuichiro.nishimura
25