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This interactive map visualizes age-standardized hypertension prevalence among adults aged 30-79 across countries, using 2019 WHO Global Health Observatory data. Users can filter results by sex through a dropdown. A sequential blue color scale encodes prevalence percentages, with a gradient legend and hover tooltips displaying exact values. The application is built with React and D3.js (d3.geoPath, d3.geoNaturalEarth1, d3.geoGraticule) to render an SVG world map from TopoJSON data, while d3.scaleSequential and interpolateBlues drive the color encoding.
AI-generated descriptionGlobal Hypertension Prevalence Visualization
This visualization shows the global prevalence of hypertension among adults aged 30-79 years, based on age-standardized data from 2019.
Data Source
The data comes from the WHO Global Health Observatory, focusing on the prevalence of hypertension among adults.
Features
- World map visualization showing hypertension prevalence rates by country
- Color-coded to represent prevalence percentages
- Hover over countries to see exact values
- Legend to interpret the color scale
Technical Implementation
Built using:
- React for component structure
- D3.js for mapping and data visualization
- TopoJSON for geographic data