ground subsidence analyses, mekong delta, vietnam · product n.: product 2-2016-2015, v2, english...

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Mỹ Kh ánhMỹ Long

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Mỹ T h ạnh

Mỹ T h ới

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Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

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01 Long Xuy e nA1

02 Rach GiaA2

03 Ca MauA3

Ho Ch iMinh City

AOI 01 Long Xuy e n - Ove rvie w A1

Glide Number: (N/A)

Activation ID: EMSN-057Product N.: Product 2-2016-2015, v2, English

Cartograph ic Inform ation

Le ge nd

Map Inform ationThe EMSN-057 service provides geospatial information facilitating assessment of drivers ofground subsidence and supporting analysis of relation between detected ground subsidenceand land use changes in Ca Mau, Long Xuyen and Rach Gia areas in the Mekong delta,Vietnam.Primary objective of the service is provision of spatially and temporally consistent, dense andsynoptic results giving insight on distribution and variance of subsidence phenomena inspace and its dynamics in time. Persistent scatterers interferometry (PSI) techniquemeasuring ground deformations from stacks of archive SAR imagery (Sentinel-1 andTerraSAR-X) was utilized to estimate displacements caused by ground subsidence in datawith synoptic spatial coverage and considerable accuracy.The core user of the map is Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ)and the national civil protection authoritiy Federal Office of Civil Protection and DisasterAssistance (BBK).

Map products are available in the Copernicus EMS Portal at the following URL:https://emergency.copernicus.eu/mapping/list-of-components/EMSN057.Delivery formats are GeoPDF and vectors.No restrictions on the publication of the mapping apply.All products are © of the European Union.

Map produced on 18/02/2019 by Indra Sistemas S.A. and Gisat s.r.o. under contract 259811with the European Commission. All products are © of the European Commission.Name of the release inspector (quality control): Indra Sistemas S.A.E-mail: gio-ems-nonrush@jrc.ec.europa.euhttp://emergency.copernicus.eu/mapping

This map shows difference of annual ground subsidence displacements in vertical directionas of 2016 and 2015 in AOI 01 Long Xuyen.Displacement values were derived from time series based on PSI analysis of Sentinel-1imagery acquired in 2016 and 2015 respectively.It is accompanied by administrative boundaries to provide a geographical context.The estimated thematic accuracy of this product is 80% or better for results derived fromSentinel-1, as it is based on cross-validation with results from independent Sentinel-1satellite track.A wider area than the Area Of Interest provided has been analyzed. Results are available inthe EMSN-057 GeoDataBase.

1:15,000

Grid: WGS 1984 Zone 48N map coordinate systemTick marks: WGS 84 geographical coordinate system ±0 0.4 0.80.2

Kilometers

The products elaborated in the framework of current mapping in Risk and Recovery modeactivation are realized to the best of our ability, optimising the available data and information.All geographic information has limitations due to scale, resolution, date and interpretation ofthe original data sources. No liability concerning the contents or the use thereof is assumedby the producer and by the European Union. The products are compliant with CopernicusEMS Risk and Recovery Product Portfolio specifications.

Disse m ination/Publication

Disclaim e r

Map Prod uction

Contact

Data Source s

Bound arie sAOI EMSN057Admin. Boundary Level 1Admin. Boundary Level 2

Full color A1, high resolution (300 dpi)

Vie tnam

Ground subsid e nce analy se s,Mekong De lta, Vie tnam

Pre-event Image layer: ESRI World Imagery Basemap.Raster layers: Difference of Persistent scatterers interferometry (PSI) technique from stacksof archived satellite SAR images. In this case Sentinel-1 (acquired 2015-2016, GSD 10m)provided under COPERNICUS by the European Union and ESA, all rights reserved.Inset maps: Administrative boundaries source is GADM.

Prod uct 2Estim ate d Annual Subsid e nce Displace m e nt [cm ] 2016 - 2015 (Se ntine l-1)

< - 4-3,9 - -3-2,9 - -2-1,9 - -1-0,9 - 11,1 - 22,1 - 33,1 - 4< 4,1

Prod uct 2: Estim ate d Annual Subsid e nce Displace m e ntCh ange - 2016-2015

South China Sea

EMSN - 057: AOI 01 Long Xuyen

Country

Event type

Vietnam

Ground subsidence analyses, Mekong DeltaEvent date 2006 - 2018