(cache) Gorkha - Damage Proxy Maps

ARIA Data

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ARIA Damage Proxy Map (DPM) from ALOS-2 Data Acquired from Ascending Orbit Created by: ARIA Team at JPL Point(s) of Contact: Sang-Ho Yun, NASA JPL Region: Long Strip of NNE - SSW, including Kathmandu and Langtang region Date: 2015-02-21 to 2015-05-02 Generated: 2015-05-06
Description: NASA data and expertise are providing valuable information for the ongoing response to the April 25, 2015, magnitude 7.8 Gorkha earthquake in Nepal. The quake has caused significant humanitarian crisis with a death toll of more than 7,500 from widespread building damaged and triggered landslides throughout the region. This was the strongest earthquake to occur in the region since the 1934 Nepal-Bihar magnitude 8.0 caused more than 10,000 fatalities. Scientists at NASA's Jet Propulsion Laboratory, Pasadena, California, and California Institute of Technology in Pasadena have developed an algorithm that produces a Damage Proxy Map (DPM) that identify region hardest-hit during the earthquake to help assist in the disaster response efforts. A Damage Proxy Map (DPM) was used in Nepal to identify building collapses in the greater Kathmandu (link to the earlier story) and is now being used to help in prioritizes where new satellite imagery will be collected. The team has now generated a DPM in the steep terrain of the Himalayas and found that it was surprisingly effective at identifying earthquake-triggered landslides. The Advanced Rapid Imaging and Analysis (ARIA) team at JPL and Caltech generated a 43-by-112 mile (70-by-180 kilometer) Damage Proxy Map, that covers the city of Kathmandu and Langtang region, using L-band interferometric synthetic aperture radar data from Japanese Space Agency (JAXA)'s ALOS-2 satellite. The technique uses a prototype algorithm to rapidly detect surface changes caused by natural or human-produced damage. The assessment technique is most sensitive to destruction of the built environment or significant ground surface change. When the radar images areas with little to no destruction, its image pixels are transparent. Increased opacity of the radar image pixels reflects damage, with areas in red reflecting the heaviest damage to cities and towns. The time span of the data for the change is Feb. 21, 2015 to May 2, 2015. Each pixel in the damage proxy map is about 100 feet (30 meters) across. The perspective image shows the DPM overlaid on the terrain with the locations of landslides identified by the National Geospatial-Intelligence Agency (NGA) preliminary damage assessment, using before and after optical imagery (May 4 damage assessment product). As an example, the images on the side show how red regions in the DPM correlate with landslide debris, as shown by the dark surface in the "after" image. The basemap images were provided by Google. Before and after images were provided by DigitalGlobe. ARIA is a JPL- and NASA-funded project being developed by JPL and Caltech. It is building an automated system for providing rapid and reliable GPS and satellite data to support the local, national and international hazard monitoring and response communities. Using space-based imagery of disasters, ARIA data products can provide rapid assessments of the geographic region impacted by a disaster, as well as detailed imaging of the locations where damage occurred. ALOS-2 radar data were made freely available for the disaster response by JAXA through Committee on Earth Observation Satellites (CEOS) in support of the response effort. Data Source(s): Japanese Space Agency (JAXA) ALOS-2 PALSAR-2 Link: KMZ, GeoTIFF Quick Web View: Quick web view Web Mapping Service (WMS) Information: http://gis1.servirglobal.net/arcgis/services/Himalaya/ARIA_DPM_ALOS2/MapServer/WMSServer?request=GetCapabilities&service=WMS Web Mapping Service (WMS) Layer Name: ARIA_DPM_ALOS2_Radar_Footprint_all Gorkha_Frame_560 (north) Gorkha_Frame_550 (middle) Gorkha_Frame_550 (middle, pixelated, perspective snapshot) Gorkha_Frame_540 (south) More Information: For more information about ARIA, visit: http://aria.jpl.nasa.gov

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ARIA Damage Proxy Map (DPM) from ALOS-2 Data Acquired from Ascending Orbit
Created by: ARIA Team at JPL
Point(s) of Contact: Sang-Ho Yun, NASA JPL Region: Long Strip of NNE - SSW, including Kathmandu and Langtang region
Date: 2015-02-21 to 2015-05-02
Generated: 2015-05-06

Description:
NASA data and expertise are providing valuable information for the ongoing response to the April 25, 2015, magnitude 7.8 Gorkha earthquake in Nepal. The quake has caused significant humanitarian crisis with a death toll of more than 7,500 from widespread building damaged and triggered landslides throughout the region. This was the strongest earthquake to occur in the region since the 1934 Nepal-Bihar magnitude 8.0 caused more than 10,000 fatalities.

Scientists at NASA's Jet Propulsion Laboratory, Pasadena, California, and California Institute of Technology in Pasadena have developed an algorithm that produces a Damage Proxy Map (DPM) that identify region hardest-hit during the earthquake to help assist in the disaster response efforts. A Damage Proxy Map (DPM) was used in Nepal to identify building collapses in the greater Kathmandu (link to the earlier story) and is now being used to help in prioritizes where new satellite imagery will be collected. The team has now generated a DPM in the steep terrain of the Himalayas and found that it was surprisingly effective at identifying earthquake-triggered landslides.

The Advanced Rapid Imaging and Analysis (ARIA) team at JPL and Caltech generated a 43-by-112 mile (70-by-180 kilometer) Damage Proxy Map, that covers the city of Kathmandu and Langtang region, using L-band interferometric synthetic aperture radar data from Japanese Space Agency (JAXA)'s ALOS-2 satellite. The technique uses a prototype algorithm to rapidly detect surface changes caused by natural or human-produced damage. The assessment technique is most sensitive to destruction of the built environment or significant ground surface change. When the radar images areas with little to no destruction, its image pixels are transparent. Increased opacity of the radar image pixels reflects damage, with areas in red reflecting the heaviest damage to cities and towns. The time span of the data for the change is Feb. 21, 2015 to May 2, 2015. Each pixel in the damage proxy map is about 100 feet (30 meters) across.

The perspective image shows the DPM overlaid on the terrain with the locations of landslides identified by the National Geospatial-Intelligence Agency (NGA) preliminary damage assessment, using before and after optical imagery (May 4 damage assessment product). As an example, the images on the side show how red regions in the DPM correlate with landslide debris, as shown by the dark surface in the "after" image. The basemap images were provided by Google. Before and after images were provided by DigitalGlobe.

ARIA is a JPL- and NASA-funded project being developed by JPL and Caltech. It is building an automated system for providing rapid and reliable GPS and satellite data to support the local, national and international hazard monitoring and response communities. Using space-based imagery of disasters, ARIA data products can provide rapid assessments of the geographic region impacted by a disaster, as well as detailed imaging of the locations where damage occurred. ALOS-2 radar data were made freely available for the disaster response by JAXA through Committee on Earth Observation Satellites (CEOS) in support of the response effort.

Data Source(s): Japanese Space Agency (JAXA) ALOS-2 PALSAR-2
Link: KMZ, GeoTIFF
Quick Web View: Quick web view
Web Mapping Service (WMS) Information: http://gis1.servirglobal.net/arcgis/services/Himalaya/ARIA_DPM_ALOS2/MapServer/WMSServer?request=GetCapabilities&service=WMS
Web Mapping Service (WMS) Layer Name:
ARIA_DPM_ALOS2_Radar_Footprint_all
Gorkha_Frame_560 (north)
Gorkha_Frame_550 (middle)
Gorkha_Frame_550 (middle, pixelated, perspective snapshot)
Gorkha_Frame_540 (south)

More Information: For more information about ARIA, visit: http://aria.jpl.nasa.gov