How Accurate Is a Poverty Map Based on Remote Sensing Data ? An Application to Malawi

Roy van der Weide (), Brian Blankespoor, Chris Elbers and Peter Lanjouw

No 10171, Policy Research Working Paper Series from The World Bank

Abstract: This paper assesses the reliability of poverty maps derived from remote-sensing data. Employing data for Malawi, it first obtains small area estimates of poverty by combining the Malawi household expenditure survey from 2010/11 with unit record population census data from 2008. It then ignores the population census data and obtains a second poverty map for Malawi by combining the survey data with predictors of poverty derived from remote sensing data. This allows for a clean comparison between the two poverty maps. The findings are encouraging - although that assessment depends somewhat on the evaluation criteria employed. The two approaches reveal the same patterns in the geography of poverty. However, there are instances where the two approa ches obtain markedly different estimates of poverty. Poverty maps obtained using remote sensing data may do well when the decision maker is interested in comparisons of poverty between assemblies of areas, yet may be less reliable when the focus is on estimates for specific small areas.

Date: 2022-09-13
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Journal Article: How accurate is a poverty map based on remote sensing data? An application to Malawi (2024)
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