| snippet:
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Landslide Density Heat Map (Copernicus Sentinel-1) on 8/15/2021 for the Haiti Earthquake August 2021 |
| summary:
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Landslide Density Heat Map (Copernicus Sentinel-1) on 8/15/2021 for the Haiti Earthquake August 2021 |
| extent:
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[[-74.5071861331972,17.9978106687791],[-72.9379139930181,18.7021885493112]] |
| accessInformation:
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NASA GSFC Landslides Team, Copernicus, ESA |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-weight:bold;">Date of Image:</SPAN></P><P><SPAN>8/15/2021</SPAN></P><P><SPAN STYLE="font-weight:bold;">Date of Next Image:</SPAN></P><P><SPAN>Unknown</SPAN></P><P><SPAN STYLE="font-weight:bold;">Summary:</SPAN></P><P><SPAN>The NASA GSFC landslides team, Dr. Alexander L. Handwerger (UCLA/JPL), and Dr. Mong-Han Huang (UMD) constructed a landslide heatmap from synthetic aperture radar (SAR) backscatter change in Google Earth Engine (https://github.com/MongHanHuang/GEE_SAR_landslide_detection). Our SAR backscatter change heatmap is made from two multi-temporal SAR backscatter intensity image stacks, composed of pre- and post-landslide event data to highlight areas with high potential landslide density. We classified potential landslide pixels using the 99th percentile value of the backscatter change. We generated the heatmap using the Heatmap (Kernel Density Estimation) in the QGIS software package. We used an Epanechnikov kernel with a 3 km radius, a scaled output value, and downsampled the 10 m Sentinel-1 GRD data to 100 m.</SPAN></P><P><SPAN>This map should be used as a guidance to identify areas likely affected by landslides. This is a rapid response product. We have not done any form of manual corrections to remove false positives.</SPAN></P><P><SPAN STYLE="font-weight:bold;">Suggested Use:</SPAN></P><P><SPAN>This map should be used as guidance to identify landslide affected areas. Warm colors (Yellow to Red) indicated a higher landslide density. This is not a research grade product.</SPAN></P><P><SPAN STYLE="font-weight:bold;">Satellite/Sensor:</SPAN></P><P><SPAN>Copernicus Sentinel-1 Synthetic Aperture Radar (SAR)</SPAN></P><P><SPAN STYLE="font-weight:bold;">Resolution:</SPAN></P><P><SPAN>100 meters</SPAN></P><P><SPAN STYLE="font-weight:bold;">Credits:</SPAN></P><P><SPAN>NASA GSFC Landslides Team, Copernicus Sentinel-1 data</SPAN></P><P><SPAN STYLE="font-weight:bold;">Esri REST Endpoint:</SPAN></P><P><SPAN>See URL section on right side of page</SPAN></P><P><SPAN STYLE="font-weight:bold;">WMS Endpoint:</SPAN></P><P><SPAN>Data Download:</SPAN></P><P><A href="https://maps.disasters.nasa.gov:443/download/gis_products/event_specific/2021/haiti_earthquake_202108/landslide_inventory/SAR%20Backscatter%20Change%20Landslide%20Density%20Map/" STYLE="text-decoration:underline;"><SPAN>https://maps.disasters.nasa.gov/download/gis_products/event_specific/2021/haiti_earthquake_202108/landslide_inventory/SAR%20Backscatter%20Change%20Landslide%20Density%20Map/</SPAN></A></P><P><SPAN /></P></DIV></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>NASA data and products are freely available to federal, state, public, non-profit and commercial users. This information can be experimental- or research-grade data products and may not be appropriate for operational use. These NASA data products, services, and the Disasters Mapping Portal are intended to aid decision makers and enhance situational awareness, but these data are not guaranteed to be consistently available or routinely updated. Please cite the information according to the direction provided in the metadata. Use of this product should include: "Contains modified Copernicus Sentinel data (2021) processed by ESA"</SPAN></P><P><SPAN /></P></DIV></DIV></DIV> |
| catalogPath:
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| title:
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Landslide Density Heat Map (Copernicus Sentinel-1) on 8/15/2021 for the Haiti Earthquake August 2021 |
| type:
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Map Service |
| url:
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|
| tags:
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["NASA","NASA Disasters Program","Haiti","Earthquake","Landslides","SAR","Sentinel-1","Copernicus","ESA"] |
| culture:
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en-US |
| name:
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landslide_density_map_sentinel1_20210815 |
| guid:
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92FE4494-6705-4BA7-8BE8-BD9A12A86D89 |
| minScale:
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0 |
| spatialReference:
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GCS_WGS_1984 |