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TopCase studies Identification of “poliovirus infection route” by studying sewage drainage utilizing AW3D

【Health】Nigeria, Niger|AW3D Standard

Identification of “poliovirus infection route” by studying sewage drainage utilizing AW3D

World Health Organization(WHO)
※Analysis support by JAXA/RESTEC

Nigeria, Pakistan, and Afghanistan are registered as polio ever-present countries. WHO samples surface sewage and tests for traces of the poliovirus. Need to narrow down effective sampling locations.
Drainage system analysis was conducted using AW3D in Kano State, Nigeria, and achieved efficient identification of sewage flowing areas. The drainage system analysis of three cities in Niger were conducted and WHO selected the sewage sampling locations. The analysis was effective especially in metropolitan areas of complex topography.

Existing analysis result with 30m resolution imagery

Existing analysis result with 30m resolution imagery

Same area using AW3D (5m resolution)

Same area using AW3D (5m resolution)

Analysis of virus survey sampling (Niamey, Niger) Analysis of virus survey sampling (Niamey, Niger)

Example of sampling locations by WHO (Niamey, Niger)

Example of sampling locations by WHO (Niamey, Niger)

Example of sampling locations by WHO (Niamey, Niger)

Example of sampling locations by WHO (Niamey, Niger)

Cooperation/Reference/Data source
“Satellite imagery technology in public health: analysis of site catchment areas for assessment of poliovirus circulation in Nigeria and Niger”, Marina Takane et al.(2016), Geospatial Health 2016; volume 11:462
・WHO
・RESTEC

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