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Title: Census-independent population mapping in northern Nigeria

Abstract

Although remote sensing has long been used to aid in the estimation of population, it has usually been in the context of spatial disaggregation of national census data, with the census counts serving both as observational data for specifying models and as constraints on model outputs. Here we present a framework for estimating populations from the bottom up, entirely independently of national census data, a critical need in areas without recent and reliable census data. To make observations of population density, we replace national census data with a microcensus, in which we enumerate population for a sample of small areas within the states of Kano and Kaduna in northern Nigeria. Using supervised texture-based classifiers with very high resolution satellite imagery, we produce a binary map of human settlement at 8-meter resolution across the two states and then a more refined classification consisting of 7 residential types and 1 non-residential type. Using the residential types and a model linking them to the population density observations, we produce population estimates across the two states in a gridded raster format, at approximately 90-meter resolution. We also demonstrate a simulation framework for capturing uncertainty and presenting estimates as prediction intervals for any region ofmore » interest of any size and composition within the study region. As a result, used in concert with previously published demographic estimates, our population estimates allowed for predictions of the population under 5 in ten administrative wards that fit strongly with reference data collected during polio vaccination campaigns.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3];  [3]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Bill & Melinda Gates Foundation, Seattle, WA (United States)
  3. Univ. of Southampton Highfield, Southampton (United Kingdom); Flowminder Foundation, Stockholm (Sweden)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1412061
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Remote Sensing of Environment
Additional Journal Information:
Journal Volume: 204; Journal Issue: C; Journal ID: ISSN 0034-4257
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 58 GEOSCIENCES; Population; Settlement mapping; Nigeria; Demographics; Polio

Citation Formats

Weber, Eric M., Seaman, Vincent Y., Stewart, Robert N., Bird, Tomas J., Tatem, Andrew J., McKee, Jacob J., Bhaduri, Budhendra L., Moehl, Jessica J., and Reith, Andrew E. Census-independent population mapping in northern Nigeria. United States: N. p., 2017. Web. doi:10.1016/j.rse.2017.09.024.
Weber, Eric M., Seaman, Vincent Y., Stewart, Robert N., Bird, Tomas J., Tatem, Andrew J., McKee, Jacob J., Bhaduri, Budhendra L., Moehl, Jessica J., & Reith, Andrew E. Census-independent population mapping in northern Nigeria. United States. doi:10.1016/j.rse.2017.09.024.
Weber, Eric M., Seaman, Vincent Y., Stewart, Robert N., Bird, Tomas J., Tatem, Andrew J., McKee, Jacob J., Bhaduri, Budhendra L., Moehl, Jessica J., and Reith, Andrew E. Sat . "Census-independent population mapping in northern Nigeria". United States. doi:10.1016/j.rse.2017.09.024. https://www.osti.gov/servlets/purl/1412061.
@article{osti_1412061,
title = {Census-independent population mapping in northern Nigeria},
author = {Weber, Eric M. and Seaman, Vincent Y. and Stewart, Robert N. and Bird, Tomas J. and Tatem, Andrew J. and McKee, Jacob J. and Bhaduri, Budhendra L. and Moehl, Jessica J. and Reith, Andrew E.},
abstractNote = {Although remote sensing has long been used to aid in the estimation of population, it has usually been in the context of spatial disaggregation of national census data, with the census counts serving both as observational data for specifying models and as constraints on model outputs. Here we present a framework for estimating populations from the bottom up, entirely independently of national census data, a critical need in areas without recent and reliable census data. To make observations of population density, we replace national census data with a microcensus, in which we enumerate population for a sample of small areas within the states of Kano and Kaduna in northern Nigeria. Using supervised texture-based classifiers with very high resolution satellite imagery, we produce a binary map of human settlement at 8-meter resolution across the two states and then a more refined classification consisting of 7 residential types and 1 non-residential type. Using the residential types and a model linking them to the population density observations, we produce population estimates across the two states in a gridded raster format, at approximately 90-meter resolution. We also demonstrate a simulation framework for capturing uncertainty and presenting estimates as prediction intervals for any region of interest of any size and composition within the study region. As a result, used in concert with previously published demographic estimates, our population estimates allowed for predictions of the population under 5 in ten administrative wards that fit strongly with reference data collected during polio vaccination campaigns.},
doi = {10.1016/j.rse.2017.09.024},
journal = {Remote Sensing of Environment},
number = C,
volume = 204,
place = {United States},
year = {Sat Oct 21 00:00:00 EDT 2017},
month = {Sat Oct 21 00:00:00 EDT 2017}
}

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