DATASET

Ground subsidence in Mekong delta, Vietnam (2018-10-26)

Collection: CEMS-RRM : CEMS Risk and Recovery Mapping 

Description


Activation date: 2018-10-26
Event type: Other

Activation reason:


The EMSN057 service provides geospatial information facilitating assessment of drivers of ground subsidence and to supporting analysis of the relation between detected ground subsidence and land use changes in Ca Mau, Long Xuyen and Rach Gia areas in the Mekong delta, Vietnam. The primary objective of the service is provision of spatially and temporally consistent, dense and synoptic results giving insight on the distribution and variance of subsidence phenomena in space and its dynamics in time. The persistent scatterers interferometry (PSI) technique, measuring ground deformations from stacks of archive SAR imagery (Sentinel-1 and TerraSAR-X), was utilized to estimate displacements. Products should complement ground based measurements, information from previous InSAR studies and contribute to evidence-based risk assessment.Annual Ground Subsidence Displacement The raster product, with 10 x 10m resolution, shows annual ground subsidence displacements in the vertical direction. The product was interpolated from displacement values of persistent scatterer points detected by the PSI technique from a stack of archived satellite SAR images.Annual Ground Subsidence Displacement ChangeThe change product shows differences of annual ground subsidence displacements in the vertical direction. It was obtained by deduction of previous from subsequent annual versions of Displacement products.In addition, average annual subsidence displacement velocity and displacement trend were evaluated from the PSI results, as demonstrated below. 

Contact

Email
jrc-ems-rapidmapping (at) ec.europa.eu

Contributors

How to cite

European Commission, Joint Research Centre (JRC) (2018): Ground subsidence in Mekong delta, Vietnam (2018-10-26). European Commission, Joint Research Centre (JRC) [Dataset] PID: http://data.europa.eu/89h/0f97c8d8-6470-400b-bea3-54ea8fac4294

Keywords

Copernicus CEMS Copernicus Emergency Management Service Risk and Recovery Mapping Activation Copernicus Service Copernicus Emergency Management Service Mapping Emergency Copernicus EMS Emergency Management Risk and Recovery Mapping VNM Other EMSN057 Vietnam

Data access

Copernicus EMS Risk and Recovery Mapping Activation [EMSN057]: Ground subsidence in Mekong delta, Vietnam (2018-10-26)
URL 
  • Maps produced in scope of this Copernicus EMS Risk and Recovery Mapping activation downloadable as georeferenced PDFs, TIFFs and JPEGs together with relevant geodatabase (GDB) and complete final report as well.

Spatial coverage

Type Value
GML
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GEO
POLYGON((105.06105122 10.40160146,105.47735344 10.40160146,105.47735344 9.15322606,105.06105122 9.15322606,105.06105122 10.40160146))
GEO
{"type":"Polygon","crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:OGC:1.3:CRS84"}},"coordinates":[[[105.06105122,10.40160146],[105.47735344,10.40160146],[105.47735344,9.15322606],[105.06105122,9.15322606],[105.06105122,10.40160146]]]}

Lineage information

No additional information

Additional information

Published by
European Commission, Joint Research Centre
Created date
2019-02-06
Modified date
2021-08-16
Issued date
2018-10-26
Landing page
https://emergency.copernicus.eu/EMSN057 
Language(s)
English
Data theme(s)
Regions and cities, Science and technology
Update frequency
unknown
Identifier
http://data.europa.eu/89h/0f97c8d8-6470-400b-bea3-54ea8fac4294
Popularity