Circles on the Map

Circles on a map

This visualization displays global population data for 2018 using circles overlaid on a natural Earth projection map. The circles, sized with a square root scale, represent population magnitudes, while a legend explains the scaling. A color legend and interactive zooming are also included. The code uses D3 v5 APIs like `geoPath`, `geoNaturalEarth1`, `scaleSqrt`, and `topojson.feature`, with data loaded from a CSV file and a TopoJSON world atlas. The visualization is rendered as an SVG within a React framework.

Vvic126

Circles on a Map

This visualization displays global population data for 2018 by projecting circles onto a natural Earth map, with circle area proportional to each country’s population. Users can pan and zoom, and hovering reveals country names and population values. The code uses `d3.geoNaturalEarth1`, `d3.geoPath`, `d3.geoCentroid`, and `d3.zoom` for the map and interactions. Data comes from a CSV joined with TopoJSON world atlas geometries, and circles are rendered as SVG elements. A square-root scale controls circle sizes, accompanied by custom size and color legends.

Pputrafandy

Circles on a map

This map visualization displays global population data for 2018 using circles sized by population magnitude and colored by data availability. The geographic map is rendered with D3’s `geoNaturalEarth1` projection and `geoPath`, while circle radii are scaled with `scaleSqrt`. The code uses TopoJSON world atlas data merged with CSV population figures. A size legend and a color legend are drawn as SVG elements, and zoom interaction is enabled via `d3.zoom`. Countries missing data appear red, while those with values are green.

NNkwachi Abel

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 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 data for the year 2018, using sized circles positioned on a natural Earth projection map. Countries are colored green or red to indicate whether they have available data. The circles are scaled using `scaleSqrt()` to map population values to radii. The code uses `geoPath` with `geoNaturalEarth1()` for the map projection, and loads data from a CSV file merged with TopoJSON world atlas features.

Ccheeson

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 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