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<title>IPUMS DHS Spatial Analysis and Health Research Hub</title>
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<description>Understand population health in its environmental context</description>
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<item>
  <title>Access to Healthcare Part 2: The 2SFCA Model</title>
  <dc:creator>Grace Cooper</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2026-05-15-distance-pt2/</link>
  <description><![CDATA[ Health outcomes and healthcare utilization rates are influenced by spatial accessibility to health, especially in rural areas of developing countries. This second post in a series of three describes one of the most effective ways to measure spatial accessibility: the Two-Step Floating Catchment Area (2SFCA) Model. ]]></description>
  <category>Health care</category>
  <category>Accessibility</category>
  <category>Distance models</category>
  <category>Gravity models</category>
  <category>Population density</category>
  <category>Network analysis</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2026-05-15-distance-pt2/</guid>
  <pubDate>Fri, 15 May 2026 05:00:00 GMT</pubDate>
</item>
<item>
  <title>Access to Healthcare Part 1: How it is Measured</title>
  <dc:creator>Grace Cooper</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2026-03-25-health-care-distance/</link>
  <description><![CDATA[ Many people in developing countries experience poor health as a result of poor spatial access to clinics and hospitals. Our understanding of how to improve global health is limited by our ability to measure healthcare accessibility. ]]></description>
  <category>Health care</category>
  <category>Accessibility</category>
  <category>Distance models</category>
  <category>Gravity models</category>
  <category>Population density</category>
  <category>Network analysis</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2026-03-25-health-care-distance/</guid>
  <pubDate>Wed, 25 Mar 2026 05:00:00 GMT</pubDate>
</item>
<item>
  <title>Vegetation and Land Cover Part 3: Land Cover/Land Use</title>
  <dc:creator>Devon Kristiansen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2026-03-13-land-cover-pt3/</link>
  <description><![CDATA[ An almost overwhelming number of vegetative and land cover data types exist. This post describes and compares sources of land cover data, as the final installment of a series of three. ]]></description>
  <category>Land cover</category>
  <category>Land Use Change Dynamics</category>
  <category>Agriculture</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2026-03-13-land-cover-pt3/</guid>
  <pubDate>Fri, 13 Mar 2026 05:00:00 GMT</pubDate>
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<item>
  <title>Vegetation and Land Cover Part 2: Environmental Moisture</title>
  <dc:creator>Devon Kristiansen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2026-03-02-land-cover-pt2/</link>
  <description><![CDATA[ An almost overwhelming number of vegetative and land cover data types exist. This second post of three describes a few common indices representing vegetative or soil moisture, with an emphasis on agricultural productivity. ]]></description>
  <category>WRSI</category>
  <category>Agriculture</category>
  <category>Seasonality</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2026-03-02-land-cover-pt2/</guid>
  <pubDate>Mon, 02 Mar 2026 06:00:00 GMT</pubDate>
</item>
<item>
  <title>Vegetation and Land Cover Part 1: Vegetative Indices</title>
  <dc:creator>Devon Kristiansen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2026-02-06-land-cover-intro/</link>
  <description><![CDATA[ An almost overwhelming number of vegetative and land cover data types exist. As the first post in a series of three, this blog gives a brief primer into vegetative indices and which ones might be most appropriate for different research goals. ]]></description>
  <category>NDVI</category>
  <category>LAI</category>
  <category>VCF</category>
  <category>Agriculture</category>
  <category>Seasonality</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2026-02-06-land-cover-intro/</guid>
  <pubDate>Fri, 06 Feb 2026 06:00:00 GMT</pubDate>
</item>
<item>
  <title>Multilevel Dietary Diversity using DHS data</title>
  <dc:creator>Devon Kristiansen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-11-21-diet-diversity-ndvi/</link>
  <description><![CDATA[ A follow-up post on using a comparable measure of dietary diversity in a multilevel model including NDVI contextual information in the model. ]]></description>
  <category>Nutrition</category>
  <category>Integrated geography</category>
  <category>Comparable indicators</category>
  <category>Multilevel models</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-11-21-diet-diversity-ndvi/</guid>
  <pubDate>Fri, 21 Nov 2025 06:00:00 GMT</pubDate>
</item>
<item>
  <title>Using Historical and Projected Climate Data to Forecast Child Malnutrition</title>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <dc:creator>Jessie Pinchoff</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-10-24-forecasting-pt4/</link>
  <description><![CDATA[ In the final post in our series on future estimation we create a model to predict child malnutrition and plug in projected climate scenario data to predict a future level of child malnutrition. ]]></description>
  <category>Climate</category>
  <category>Scenarios</category>
  <category>Temperature</category>
  <category>R</category>
  <category>Nutrition</category>
  <category>Forecasts</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-10-24-forecasting-pt4/</guid>
  <pubDate>Fri, 24 Oct 2025 05:00:00 GMT</pubDate>
</item>
<item>
  <title>Harnessing CHC-CMIP6 Climate Scenario Data to Explore the Future</title>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <dc:creator>Jessie Pinchoff</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-09-05-forecasting-pt3/</link>
  <description><![CDATA[ Returning to our series on future estimation, we provide an overview of a data source for future climate scenarios. ]]></description>
  <category>Climate</category>
  <category>Scenarios</category>
  <category>Temperature</category>
  <category>R</category>
  <category>CHIRTS</category>
  <category>Comparison</category>
  <category>GGSPATIAL</category>
  <category>Terra</category>
  <category>SF</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-09-05-forecasting-pt3/</guid>
  <pubDate>Fri, 05 Sep 2025 05:00:00 GMT</pubDate>
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</item>
<item>
  <title>Measuring Dietary Diversity using DHS data</title>
  <dc:creator>Devon Kristiansen</dc:creator>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-08-06-intro-diet-diversity/</link>
  <description><![CDATA[ An introduction to constructing comparable dietary diversity indicators. This post breaks away from the series on future conditions, with the first post of two on dietary diversity. ]]></description>
  <category>Nutrition</category>
  <category>Integrated geography</category>
  <category>Comparable indicators</category>
  <category>Trends</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-08-06-intro-diet-diversity/</guid>
  <pubDate>Wed, 06 Aug 2025 05:00:00 GMT</pubDate>
</item>
<item>
  <title>Estimating the now and predicting the future: Fertility rate estimation and population projection</title>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <dc:creator>Elizabeth Heger Boyle</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-06-03-forecasting-pt2/</link>
  <description><![CDATA[ Use the DHS to estimate fertility levels and project future population levels ]]></description>
  <category>Projections</category>
  <category>Population</category>
  <category>Fertility</category>
  <category>Methodology</category>
  <category>R</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-06-03-forecasting-pt2/</guid>
  <pubDate>Tue, 03 Jun 2025 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2025-06-03-forecasting-pt2/images/family.jpg" medium="image" type="image/jpeg"/>
</item>
<item>
  <title>Anticipating the Future: Important terminology</title>
  <dc:creator>Molly Brown</dc:creator>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-04-23-forecasting-pt1/</link>
  <description><![CDATA[ Part 1 in our series exploring climate and population projections in health research ]]></description>
  <category>Projections</category>
  <category>Scenarios</category>
  <category>Forecasts</category>
  <category>Predictions</category>
  <category>Population</category>
  <category>Methodology</category>
  <category>Research concepts</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-04-23-forecasting-pt1/</guid>
  <pubDate>Wed, 23 Apr 2025 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2025-04-23-forecasting-pt1/images/image1.png" medium="image" type="image/png" height="99" width="144"/>
</item>
<item>
  <title>From MODIS to VIIRS: The Latest Source for NDVI Data</title>
  <dc:creator>Finn Roberts</dc:creator>
  <dc:creator>Rebecca Luttinen</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2025-03-31-viirs/</link>
  <description><![CDATA[ Update your NDVI workflows with NASA’s newest instruments ]]></description>
  <category>NDVI</category>
  <category>VIIRS</category>
  <category>MODIS</category>
  <category>NASA</category>
  <category>Agriculture</category>
  <category>Food production</category>
  <category>Importing Data</category>
  <category>R</category>
  <category>Reproducible workflows</category>
  <category>terra</category>
  <category>rhdf5</category>
  <category>stringr</category>
  <category>purrr</category>
  <category>ggspatial</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2025-03-31-viirs/</guid>
  <pubDate>Mon, 31 Mar 2025 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2025-03-31-viirs/index_files/figure-html/listing-img-1.png" medium="image" type="image/png" height="115" width="144"/>
</item>
<item>
  <title>Incorporating Qualitative Methods into Spatial Health Research</title>
  <dc:creator>Kathryn Grace</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-12-06-qualitative-methods/</link>
  <description><![CDATA[ Spatiotemporal research is enhanced when guided by local knowledge, perspective, and expertise. ]]></description>
  <category>Qualitative methods</category>
  <category>Extreme weather</category>
  <category>Methodology</category>
  <category>Research concepts</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-12-06-qualitative-methods/</guid>
  <pubDate>Fri, 06 Dec 2024 06:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-12-06-qualitative-methods/images/flowchart.png" medium="image" type="image/png" height="121" width="144"/>
</item>
<item>
  <title>Using QGIS for Spatial Data Analysis</title>
  <dc:creator>Ankit Sikarwar</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-10-25-qgis/</link>
  <description><![CDATA[ Standalone GIS software can provide an interactive alternative to code-based analysis workflows ]]></description>
  <category>GIS</category>
  <category>QGIS</category>
  <category>Open-source software</category>
  <category>CHIRTS</category>
  <category>Geoprocessing</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-10-25-qgis/</guid>
  <pubDate>Fri, 25 Oct 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-10-25-qgis/images/Fig4.png" medium="image" type="image/png" height="76" width="144"/>
</item>
<item>
  <title>Using Leaflet for Exploratory Data Analysis: Part 2</title>
  <dc:creator>Finn Roberts</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-09-30-leaflet-pt2/</link>
  <description><![CDATA[ Exploring customization options for leaflet maps ]]></description>
  <category>Cartography</category>
  <category>Population density</category>
  <category>Urbanization</category>
  <category>Interactivity</category>
  <category>Longitudinal data</category>
  <category>R</category>
  <category>leaflet</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-09-30-leaflet-pt2/</guid>
  <pubDate>Mon, 30 Sep 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-09-30-leaflet-pt2/images/listing-img.png" medium="image" type="image/png" height="111" width="144"/>
</item>
<item>
  <title>Using Leaflet for Exploratory Data Analysis: Part 1</title>
  <dc:creator>Finn Roberts</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-09-13-leaflet-pt1/</link>
  <description><![CDATA[ An introduction to interactive mapping using the leaflet package ]]></description>
  <category>Cartography</category>
  <category>Population density</category>
  <category>Urbanization</category>
  <category>Longitudinal data</category>
  <category>R</category>
  <category>leaflet</category>
  <category>terra</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-09-13-leaflet-pt1/</guid>
  <pubDate>Fri, 13 Sep 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-09-13-leaflet-pt1/images/listing-img.png" medium="image" type="image/png" height="91" width="144"/>
</item>
<item>
  <title>Measuring Population Density</title>
  <dc:creator>Grace Cooper</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-08-30-pop-density/</link>
  <description><![CDATA[ An introduction to gridded data sources used to measure human presence across the globe ]]></description>
  <category>Population</category>
  <category>Population density</category>
  <category>Urbanization</category>
  <category>Data sources</category>
  <category>GRUMP</category>
  <category>GHSL</category>
  <category>LandScan</category>
  <category>WorldPop</category>
  <category>Research concepts</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-08-30-pop-density/</guid>
  <pubDate>Fri, 30 Aug 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-08-30-pop-density/images/listing-img.png" medium="image" type="image/png" height="140" width="144"/>
</item>
<item>
  <title>Aggregation Methods for NDVI Data</title>
  <dc:creator>Finn Roberts</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-08-16-ndvi-data-2/</link>
  <description><![CDATA[ We use data from two regions to illustrate approaches to processing NDVI data ]]></description>
  <category>NDVI</category>
  <category>Seasonality</category>
  <category>Climatological normals</category>
  <category>Agriculture</category>
  <category>Extreme weather</category>
  <category>Food production</category>
  <category>R</category>
  <category>Time series</category>
  <category>terra</category>
  <category>ggspatial</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-08-16-ndvi-data-2/</guid>
  <pubDate>Fri, 16 Aug 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-08-16-ndvi-data-2/index_files/figure-html/listing-img-1.png" medium="image" type="image/png" height="115" width="144"/>
</item>
<item>
  <title>An Iterative Workflow for Loading NDVI Data in R</title>
  <dc:creator>Finn Roberts</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-08-01-ndvi-data/</link>
  <description><![CDATA[ Use purrr and terra to efficiently integrate NDVI data across multiple spatial extents ]]></description>
  <category>NDVI</category>
  <category>Agriculture</category>
  <category>Extreme weather</category>
  <category>Food production</category>
  <category>Importing Data</category>
  <category>R</category>
  <category>Reproducible workflows</category>
  <category>Time series</category>
  <category>stringr</category>
  <category>purrr</category>
  <category>terra</category>
  <category>ggspatial</category>
  <category>sf</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-08-01-ndvi-data/</guid>
  <pubDate>Thu, 01 Aug 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-08-01-ndvi-data/index_files/figure-html/listing-img-1.png" medium="image" type="image/png" height="115" width="144"/>
</item>
<item>
  <title>Introducing NDVI as a Tool for Population Health Research</title>
  <dc:creator>Jude Mikal</dc:creator>
  <link>https://ipums.github.io/dhs-research-hub/posts/2024-07-02-ndvi-concepts/</link>
  <description><![CDATA[ Satellite imagery can be used in conjunction with place-specific research methods to assess food production and its impacts ]]></description>
  <category>Extreme weather</category>
  <category>NDVI</category>
  <category>Food production</category>
  <category>Agriculture</category>
  <category>Methodology</category>
  <category>Research concepts</category>
  <guid>https://ipums.github.io/dhs-research-hub/posts/2024-07-02-ndvi-concepts/</guid>
  <pubDate>Tue, 02 Jul 2024 05:00:00 GMT</pubDate>
  <media:content url="https://ipums.github.io/dhs-research-hub/posts/2024-07-02-ndvi-concepts/images/max_ndvi.png" medium="image" type="image/png" height="65" width="144"/>
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