!

h#p://www.regid.irides.tohoku.ac.jp/response/!

Bruno!Adriano!
Yanbing!Bai!
Hideomi!Gokon!(The!Univ.!of!Tokyo)!
Erick!Mas!
Shunichi!Koshimura!

!

!

!

(ReGiD!Lab.)!

2!

!

•!

–––!
!

!

•!

–––!

!

(ReGiD!Lab.)!

3!

JAXA!ALOSQ2/PALSARQ2!

!

AcquisiUon!Ume:!!
PostQevent:!2016/04/17![VHQVV]!
PreQevent:!2015/05/17![VHQVV]!

AcquisiUon!Ume:!!
PostQevent:!2016/04/16![HH]!

!

(ReGiD!Lab.)!

4!

1.

!(Change!DetecUon)!
!

2.

(Machine!Learning)!

!

(ReGiD!Lab.)!

5!

!
!(Change!DetecUon!Approach)!

!

(ReGiD!Lab.)!

6!

PALSARQ2!

!

Sigma&naught+(σ°)+images+• AcquisiUon!mode:!StripMap!(SM1)!
• Ascending!Orbit!direcUon!(azimuth)/!Right!side!observaUon!(range)!
• VHQ!and!VVQpolarizaUons!
• Data!format!Level!1.5!/!Pixel!Spacing:!2.5!m!
2015Q05Q17

2016Q04Q17

th+
Azimu

th+
Azimu

rang

e+e+
rang

Assessed+Area+

σ°[dB]!

σ°[dB]!

Q40!

Q40!

+10!

+10!

!

(ReGiD!Lab.)!

7!

!
Kumamoto!city!
130°40'E

130°42'E

130°44'E130°46'E32°50'N¹Z
1.0

32°48'N-0.4

Liu!et!al.,!2013)

Kumamoto!Castlez=32°46'N

d"=!
r"=

012!

4km

Source: Esri, DigitalGlobe, GeoEye, Earthstar
Geographics, CNES/Airbus DS, USDA, USGS, AEX,
Getmapping, Aerogrid, IGN, IGP, swisstopo, and the
GIS User Communityd− 0.5⋅ r
max d!

!

Liu,!W.,!F.!Yamazaki,!H.!Gokon!and!S.!Koshimura,!
ExtracUon!of!TsunamiQFlooded!Areas!and!Damaged!
Buildings!in!the!2011!TohokuQOki!Earthquake!from!
TerraSARQX!Intensity!Images,!Earthquake!Spectra,!Vol.!
29,!No.!S1,!pp.!S183QS200,!2013.!doi:!
10.1193/1.4000120(ReGiD!Lab.)!

8!

!
Kumamoto!Castle
130°42'30"E

130°42'40"E

Pre&event+Image+(GSI)

130°42'20"E

Z
32°48'40"N

1.032°48'20"N

32°48'30"N-0.4

0 50 100!

200m

Source: Esri, DigitalGlobe, GeoEye, Earthstar
Geographics, CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo, and the
GIS User Community(ReGiD!Lab.)!

Post&event+Image+(GSI)

130°42'10"E9!

!
(Machine!Learning!Approach)!
!

!

(ReGiD!Lab.)!

10!

(Bai!et!al.,!2015)!
Post event ALOS-2 / PALSAR-2(Level 1.1)
GeocodingCalibration

Pre-Processing

Speckle filtering
HH backscattering coefficient
Polarimetric and texture feature extraction In built up area (by block)(1 polarimetric feature and 36 texture features)
Training data
(Obtained from 2015 Nepal earthquake)

Random forest classification (Breiman et al., 2001)
Damage Mapping!

(ReGiD!Lab.)!

11!

PALSARQ2!

(2016/04/16)!

SigmaQnaught!(σ°)!image!

¹th+
Azimu

rang!

• AcquisiUon!mode:!StripMap!
(SM1)!
• Ascending!Orbit!direcUon!
(azimuth)!
• Right!side!observaUon!(range)!
• HHQpolarizaUon!
• Data!format!Level!1.1!
• Pixel!Spacing:!2.5!m!
Sources: Esri, HERE, DeLorme,USGS, Intermap, increment P
Corp., NRCAN, Esri Japan,METI, Esri China (Hong Kong),
Esri (Thailand), MapmyIndia, ©

e+

σ°[dB]!
+10!

Q40!
0

16/04/27!

51020km

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics,
CNES/Airbus DS, USDA, USGS, AEX, Getmapping, Aerogrid, IGN,IGP, swisstopo, and the GIS User Community(ReGiD!Lab.)!

12!

!
130°47'30"E

130°48'0"E

130°48'30"E

130°49'0"E

130°49'30"ENo damage32°46'30"N

32°47'0"N

32°47'30"N

32°48'0"N

Damaged0250 500!

1,000mSource: Esri, DigitalGlobe, GeoEye, Earthstar
Geographics, CNES/Airbus DS, USDA, USGS, AEX,
Getmapping, Aerogrid, IGN, IGP, swisstopo, and the
GIS User Community(ReGiD!Lab.)!

13!

!
!

!
•!

2

•	!

!
!
•!
•!
•!
!

(ReGiD!Lab.)!

14!