Title:
LANDSLIDE DISASTER AREA DETECTING DEVICE AND LANDSLIDE DISASTER AREA DETECTING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/223483
Kind Code:
A1
Abstract:
The landslide disaster area detecting device (CK) comprises: a first acquiring unit (SH) that acquires remote sensing images (RG) before and after the occurrence of a landslide disaster; a first detecting unit (KE) that detects vegetation areas from the remote sensing images (RG); a second acquiring unit (SH) that acquires a numerical elevation model (SHM) of the area where the landslide disaster has occurred; a first calculating unit (SA) that calculates the slope angle of a target point from the numerical elevation model (SHM), the target point in the remote sensing images (RG) being a point that was a vegetation area before the occurrence of the landslide disaster and that is no longer a vegetation area after the occurrence of the landslide disaster; a first determination unit (HA) that determines that an area is a mountainous landslide disaster area (SAJ) when the slope angle exceeds a predetermined slope angle threshold value; a third acquiring unit (SH) that acquires SAR images (SG) before and after the landslide disaster; a second calculating unit (SA) that calculates the variation in backscatter coefficients in a local area from the SAR images (SG); a third calculating unit (SA) that calculates the difference in the variation before and after the landslide disaster; a second determining unit (HA) that places limits around the mountainous landslide disaster area (SAJ); a third determining unit (HA) that determines that the area is an urban landslide disaster area (SIJ) when the difference exceeds a predetermined threshold value and the area was not a vegetation area before and after the landslide disaster; and a generating unit (SE) that generates a landslide disaster area distribution on the basis of the mountainous landslide disaster area (SAJ) and the urban landslide disaster area (SIJ).
Inventors:
SUZUKI MASATAKA (JP)
Application Number:
PCT/JP2022/020755
Publication Date:
November 23, 2023
Filing Date:
May 19, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
E02D17/20; G01D21/00
Foreign References:
| CN114241333A | 2022-03-25 | |||
| JP2013221886A | 2013-10-28 | |||
| CN113408547A | 2021-09-17 | |||
| JP2021056008A | 2021-04-08 |
Attorney, Agent or Firm:
SANNO PATENT ATTORNEYS OFFICE (JP)
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