Fukushima mappingBefore and after the disaster Ikiya State of the Map 2012 Tokyo,Japan,September 2012
Self-introductionIm Ikiya.I live in Fukushima, Japan.I map Fukushima and East Japan.Ive mapped Asia, the Middle East, Haiti, Christchurch, and other countris.Sorry, my English is not so fluent. Where did you contribute to OpenStreetMap? http://yosmhm.neis-one.org/?ikiya
Chapter 1 The Nature of Fukushima and Mapping Before the DisasterDawn on the beach. Photo : Before the disaster / Soma city,Fukushima
Last March, a huge earthquake and tsunamihit the region,causing major damage. A nuclear accident also occurred. Fukushima
These photos were taken from the same spot. (Before the disaster) (After the disaster) You can see the remains of the yellow center line and the foot path in the bottom picture
These photos were taken from the same spot. (Before the disaster) (After the disaster) The vast pine forest was washed away in the tsunami.
After the disasterJapan had a lot of support from around the world.Thank you very much for all your kind support. Photo : After the disaster / Iwaki city,Fukushima
A lot of mappers edited the Tohoku, Japan OSM after the earthquake.http://wiki.openstreetmap.org/wiki/2011_Sendai_earthquake_and_tsunami
I am deeply grateful for all the supportthat has come from other regions. Tsunami damage area Sendai City, Miyagi
Thank you so much for contributing.I have always been interested in crisis mapping.However becoming a disaster victim myselfhas made me realise that I can only do so muchas “a Mapper”. http://www.itoworld.com/static/openstreetmap_tools/osm_mapper.html
I think Tsunamis are not mere waves .They are “Giant Walls of Pressure”.Photo : After the disaster / Iwaki city,Fukushima
The tsunami destroyed everythingand the receding wave carriedmuch of the debris out to sea.Photo : After the disaster / Iwaki city,Fukushima
This is some of the debris that has been collected.Photo : After the disaster / Iwaki city,Fukushima
A survey by GSI(Geospatial Information Authority of Japan) has revealed that land in the Tohoku region moved to the south-east in the earthquake. Ishinomaki City in Miyagi Prefecture moved up to 5.3meters.Geospatial Information Authority of Japan(GSI)http://www.gsi.go.jp/chibankansi/chikakukansi_tohoku2.html”平成23年（2011年）東北地方太平洋沖地震に伴う地殻変動について”国土地理院 平成23年3月19日発表
I compared data taken on my handheld GPSbefore the earthquake to that taken after the earthquake to determine if the earths crust had moved. The GPS model used was the same in both cases.
Comparison at the southern tip of the Breakwater 4m May 2012 logs Comparison of GPS logs taken before and after the earthquake show an eastward movement of approximately 4m. Sep 2008 logsRestroom buildings Restroom buildings Logs of taken from the restroom buildings also appear to show movement.
Comparison at the Circular stage on the beach3m Comparison of GPS logs taken before and after the earthquake show an eastward movement of approximately 3m. 3m
Although comparison of data taken by a commercial GPSand the handheld GPS showed the datafrom the latter to be less accurate,I realised it was possible toconfirm the movement of the earths crustwith a handheld GPS under the right circumstances.
A nuclear accident followed the earthquake and tsunami.Many mappers mapped the Fukushima nuclear power plant.
Following the accident citizens were not made aware of the distribution of radiation. After the accident, measurement and release of radiation data by the government was too slow.Photo : After the disaster / Iwaki city,Fukushima
About one month after the accidentI decided to map the radiation levels in Fukushima as a private citizen. Radiation Mapping
First,I set several waypoints on my GPSand recorded the levels with a Geiger Counter.
Radiation Level Memos Waypoints Number + Radiation Level
Which part of this map draws your attention? Yonezawa CityMany of you would answer “The red area”.The area that draws my attention is this blue area over Yonezawa.To my relief, this showed that area within 20km of Fukushima Citywas not contaminated in the accident.The focus of society has been on the hotspots.However, I think we should focus more on which areas are safe.
“In the year following the disaster,I didnt visit or map the coastlines I had visited so often in the past.I was scared,but I was also grieving.”
But the necessity of providing data for OSMmade me start mapping the coast again.
Last year, When I saw aerial images from Bing taken after the earthquake,I knew exactly which areas I had to go to.I at last made my way to those places this year. Bing coverage analyser showing Fukushima area. http://ant.dev.openstreetmap.org/bingimageanalyzer/?lat=-12&zoom=1
From this experience, I realized that OSM teaches us many things and gives us many things. Thank you for OSM.
Thank you ! State of the Map 2012 Tokyo,Japan,September 2012