MAP - CIRCLES — VizHub

Circles on a Map

This visualization displays global population data for 2018 using proportional circles positioned at country centroids on a natural Earth projection map, with circle area scaled by population via d3.scaleSqrt. Countries lacking data appear in pink, while those with data are gray, and hovering shows a tooltip with the region name and population. Users can pan and zoom the map using d3.zoom, and a size legend generated with d3.ticks communicates the population scale. The visualization relies on d3.geoPath and d3.geoCentroid for geographic rendering, TopoJSON for world boundaries, and CSV data joined by country code to populate each feature.

RRaymond Li

Circles on a Map

This visualization displays global population data for 2018 using proportional circles overlaid on a natural Earth projection map. The area of each circle represents the population of its corresponding country, with circles positioned at the centroid of each nation. The map uses d3.geoPath for rendering country boundaries and a d3.scaleSqrt for sizing circles. Users can pan and zoom through the d3.zoom API, and hovering over a country reveals its population via a title tooltip. Data comes from a CSV joined with a TopoJSON world atlas, and a custom size legend communicates the circle-to-population mapping.

Jjesramyep1263

Circles on a Map

Jjesramyep1263

Circles on a Map

This visualization displays global population data for 2018 using proportional circles centered on each country, with area encoding population size. The map supports pan and zoom, and hovering reveals a tooltip with the country name and exact population. It uses a natural Earth projection via d3.geoNaturalEarth1, with d3.geoPath for country boundaries and d3.scaleSqrt for circle sizing. A custom size legend and color legend (d3.scaleOrdinal with schemeSpectral) provide context. Data comes from a CSV file merged with world topology from TopoJSON, rendered as SVG. The implementation uses d3.zoom for interaction and d3.geoCentroid to position circles.

KKevinw97

Circles on a Map

This visualization displays global population data for 2018 using proportional circles positioned at country centroids on a natural Earth projection. The map uses d3.geoPath and d3.geoCentroid to render countries and place scaled symbols, with d3.scaleSqrt determining circle radii. Hovering reveals country names and population values via SVG titles. Pan and zoom are enabled through d3.zoom, while a d3.scaleSqrt-based legend indicates population magnitudes. Data comes from a CSV file of UN population estimates joined with TopoJSON world geometry, rendered as SVG with color coding for missing values.

Bbprokopowicz

Circles on a Map

This visualization depicts global population data for 2018, using proportional circles on a natural Earth projection map. Country boundaries are rendered as SVG paths via `d3.geoPath`, while circle areas encode population using `d3.scaleSqrt`. Pan and zoom are enabled through a custom `zoom` event handler. Data is loaded from a CSV file and a TopoJSON world atlas, merged by country code. A size legend clarifies the scaling, and hovering on a country reveals its name and population via a tooltip.

MMartin Palanca

Circles on a Map

This visualization maps global population by country using proportional circles centered on each nation’s geographic centroid. The area of each circle encodes the 2018 population estimate, with missing data shown in red on a gray map. Users can pan and zoom via d3.zoom, and hover over countries to reveal population values in tooltips. The code uses d3.geoPath, d3.geoNaturalEarth1, and topojson for map rendering, with a d3.scaleSqrt for circle sizing and a custom size legend.

Pputrafandy

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.

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