Fukushima mapping Before and after the disaster

Fukushima mapping
Before and after the disaster

Ikiya State of the Map 2012
Tokyo,Japan,September 2012

Self-introduction

I'm Ikiya.
I live in Fukushima, Japan.
I map Fukushima and East Japan.
I've 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 Disaster

Dawn on the beach. Photo : Before the disaster / Soma city,Fukushima

Japan
I live in Fukushima city.
Fukushima is 250kms north of Tokyo.

Fukushima

Tokyo

© OpenStreetMap contributors, CC BY-SA

Fukushima city

About 2,000,000 people
live in the Fukushima area.


This is Fukushima City.

Fukushima City is the prefectural capital.
280,000 people live in Fukushima City.

I love Fukushima's nature and coastlines.

Photo : Before the disaster / Soma city,Fukushima

The coastline area was inhabited by many people.

Fukushima Prefecture is rich in green and nature.


I loved to visit in every season.

These are my GPS Logs in the Fukushima area.

We map towns in Fukushima.

Photo : Fukushima city

We map highways in Fukushima.


We map Fukushima coastlines.


The Fukushima coastline is 130km long.

We mapped the Fukushima coastline
before the Disaster.
130km

These are
mapping GPS logs.

Chapter 2

Tohoku, Japan
Earthquake, Tsunami

Last March,
a huge earthquake and tsunami
hit 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 disaster
Japan 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 support
that 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 myself
has made me realise that I can only do so much
as “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”.


The tsunami destroyed everything
and the receding wave carried
much of the debris out to sea.


This is some of the debris
that has been collected.


This sea side camping ground was washed away.

This area I spent several years mapping has all
but disappeared.
All houses,highways were washed away.

These GPS logs are full of memories and people's lives
before the disaster.
I hope they can be used as the region rebuilds in the future.

Chapter 3

Mapping after the disaster

These are mapping GPS logs
after the disaster.

Fukushima I
Nuclear Power Plant
20km
evacuation zone


In the year following the disaster,
I didn't visit or map the coastlines I had visited so often in the past.
I was scared, but I was also grieving.


It was not until this year that I could at last
set foot on the now-deserted coast.
Drawing maps brings back memorise of those places.

Movement of the Earth's crust
in the Earthuake

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 GPS
before the earthquake to that taken after the earthquake
to determine if the earth's crust had moved.
The GPS model used was the same in both cases.

I compared data two places.

6km-long
Breakwater

Circular stage
on the beach


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 logs
'Restroom buildings'

'Restroom buildings'

Logs of taken from
the restroom buildings
also appear to show movement.

Comparison at the Circular stage on the beach
3m

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 GPS
and the handheld GPS showed the data
from the latter to be less accurate,
I realised it was possible to
confirm the movement of the earth's crust
with 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.


About one month after the accident
I decided to map the radiation levels in Fukushima
as a private citizen.

Radiation Mapping

First,
I set several waypoints on my GPS
and recorded the levels with a Geiger Counter.

Radiation Level Memos

Waypoints Number + Radiation Level

Radiation Map
Waypoints Number + Radiation Lev


Next,
I thought that in order to widen the mapping area,
I used a GPS ,Geiger Counter and IC recorder
and mapped with my car. (Voice mapping)

I recorded waypoints and radiation levels by voice.

Last summer
I recorded
7,000 waypoints
over 2,400km.

Waypoints Number + Radiation Level


Which part of this map draws your attention?


Which part of this map draws your attention?

Yonezawa City

Many 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 City
was 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.

Use of OSM in Radiation Level Map

Web mapping sites such as Google and Yahoo
only show detailed maps for the areas in blue.

The red areas signify the evacuation zones Fukushima I
(～August,2012), which were of great concern Nuclear Power Plant
to citizens. 20km
evacuation zone
However, there were almost no detailed map
of these areas.
Even now, these are insufficient detailed maps
of this area.

I believe OpenStreetMap can be used to
effectively create detailed maps for these
red areas. © OpenStreetMap contributors, CC BY-SA

Now, the number of measurement points has increased and the government
is releasing substantial amounts of reliable data.
We are now focusing on even more precise data.


In order to gather this precise data,we have been measuring
the radiation on foot
using new equipment with data-saving functions.


“In the year following the disaster,
I didn't 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 OSM
made 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

Fukushima mapping Before and after the disaster

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