Circles on a Map

Circles on a Map

This visualization maps global population data by country, using circle area to represent population size for 2018. Users can pan and zoom across a natural Earth projection, and hover to reveal exact population counts. The visualization uses d3.geoPath, d3.geoNaturalEarth1, d3.scaleSqrt, and d3.zoom, with data from a CSV joined to TopoJSON world atlas geometry. A size legend and color legend are rendered as SVG, with circles and country borders styled for clarity.

LLeandro Souza

Circles on a Map

This visualization displays global population by country using circles overlaid on a natural Earth projection map, with circle area proportional to 2018 population data. Users can pan and zoom the map and hover over countries to see region names and population figures. The implementation uses D3 v5 with `geoNaturalEarth1`, `geoPath`, `geoCentroid`, and `scaleSqrt` for sizing, while loading data from a CSV file and TopoJSON world atlas. Circle positions derive from projected centroids, and a custom size legend communicates the population scale.

EElena Dreosti

Circles on a Map

This visualization uses a natural Earth projection to display global population data for 2018, with each country represented by a circle whose area is proportional to its population. The map supports pan and zoom interactions, and hovering over a country reveals its population through a tooltip. Built with D3.js, it uses `d3.geoPath` for map rendering, `d3.scaleSqrt` for the size scaling, and custom legends to explain both the color scheme and circle sizes. Population data comes from a CSV file joined to a TopoJSON world atlas.

GGamue-cmd

Circles on a Map

This visualization displays global population data for 2018 using circles overlaid on a natural Earth projection map. The area of each circle is proportional to the country’s population, with missing data highlighted in red. Users can pan and zoom via d3.zoom, and hover over countries to see exact population figures. Built with D3 v5, it uses d3.geoPath and d3.geoNaturalEarth1 for map rendering, d3.scaleSqrt for circle sizing, and TopoJSON for world boundaries, with population data joined from a CSV file.

Ggcappadaniel

Circles on a Map

This visualization displays global population data for 2018, with each country represented by a circle whose area corresponds to population size. Pan and zoom interactions use d3.zoom. The map is rendered with d3.geoNaturalEarth1 and d3.geoPath, while circle radii are scaled by d3.scaleSqrt. Hovering reveals country names and population counts via SVG title elements. Data comes from a CSV joined with TopoJSON world atlas geometry, and a d3.scaleOrdinal color legend and size legend are included.

NNikhil

Circles on a Map

This visualization shows world population by country using scaled circles over a natural Earth projection map, with circle area proportional to 2018 population data. Users can pan and zoom the map and hover over countries to see regional names and exact population figures. The code uses D3 v5 with `geoNaturalEarth1`, `geoPath`, `geoCentroid`, `scaleSqrt`, and `zoom`, rendering SVG paths for country borders and semi-transparent circles. Population data comes from a CSV file merged with TopoJSON world atlas geometry.

Yyakupermurat

Circles on a Map

This visualization displays global population data for 2018 as circles on a natural Earth projection map. Countries without data are shown in one color, while those with data use a square-root size scale to encode population magnitude. The code uses d3.geoPath for map rendering, d3.geoCentroid for positioning, and d3.scaleSqrt for circle sizing. Data comes from a CSV file joined with TopoJSON world atlas features, with interactive zoom via the d3.zoom API.

TTaheniataallah

Circles on a Map

This visualization displays global population data for 2018 using scaled circles positioned at country centroids on a natural Earth projection map. Circle area encodes population magnitude, while hovering reveals exact population figures and regional names. The map supports pan and zoom interactions through d3.zoom. Built with d3.geoNaturalEarth1 and d3.geoPath for map rendering, it uses d3.scaleSqrt for circle sizing and d3.scaleOrdinal with a spectral scheme for the categorical color legend. Population data comes from a CSV file processed alongside TopoJSON world boundaries.

EElena Dreosti