Cicrcle on Map

Circles on a Map

This example visualizes global population estimates for 2018 using circles overlaid on a natural Earth projection map. Countries with missing data appear pink, while populated areas are gray with semi-transparent cyan circles sized by population via d3.scaleSqrt. The visualization includes an interactive size legend with formatted tick values and a color legend. It uses d3.geoPath, d3.geoCentroid, d3.zoom, and d3.scaleOrdinal, rendering with SVG. Population data comes from a UN CSV file joined to TopoJSON world geometry, with tooltips showing country names and population counts.

Ffloresh

Circles on a Map

This visualization displays global population by country in 2018, with circles sized proportionally to population counts overlaid on a natural Earth projection map. The map supports pan and zoom interactions, and hovering over countries reveals population data or missing-data indicators. Built with D3 v5, the example uses `d3.geoPath` for map rendering, `d3.geoNaturalEarth1` for projection, `d3.zoom` for interaction, and `d3.scaleSqrt` for circle sizing, while styling and legend components are defined in separate JavaScript modules. Population data comes from a UN estimates CSV, with country boundaries from a TopoJSON world atlas.

GGerryLivermore

Circles on a Map

This interactive visualization displays global population estimates for 2018 as proportional circles centered on each country, overlaid on a natural Earth projection map. The map uses D3 v5’s `geoPath` and `geoNaturalEarth1`, while circle radii are scaled with `scaleSqrt` based on UN population data. A zoom behavior lets viewers pan and scale the map, and a custom size legend with tick labels explains the scaling. Countries without data appear in a distinct color, and hovering reveals country names and population figures via SVG `<title>` elements.

PPeter S

Circles on a Map

This map visualization displays global population by country using semi-transparent circles sized proportionally to 2018 population data from the UN, with a square-root scale for area encoding. The code uses d3.geoNaturalEarth1 projection, d3.geoPath, and d3.geoCentroid to position circles at country centroids, while d3.zoom enables panning and zooming. Hovering reveals country names and population values via SVG title elements, and a custom size legend explains the circle scaling. Data sources include UN population CSV and TopoJSON world atlas geometry.

Jjesramyep1263

Circles on a Map

This visualization displays global population estimates for 2018 as proportional circles positioned at country centroids on a natural Earth projection map. Country boundaries are rendered as paths using d3.geoPath, while circle radii scale with population via d3.scaleSqrt. Two legends—a size legend and a color legend—communicate the quantitative mapping, with colors assigned through d3.scaleOrdinal. The map supports zooming through d3.zoom, and data comes from United Nations population estimates loaded as CSV and TopoJSON, processed with topojson.feature.

HHe Jianfeng

Circles on a Map

This visualization shows global population estimates for 2018 as colored circles positioned at the geographic centroid of each country on a natural Earth projection. A size legend encodes population magnitudes, while a color legend maps a categorical scale, with countries lacking data highlighted in a different shade. The code uses d3.geoPath and d3.geoCentroid for map rendering, d3.scaleSqrt for circle sizing, and d3.scaleOrdinal with a spectral scheme for colors. Population data comes from a UN CSV dataset, joined to country geometries from a TopoJSON world atlas. Users can pan and zoom via d3.zoom, with hover tooltips showing region names and formatted population counts.

NNita

Circles on a Map

This map visualization displays global population estimates for 2020 using circles sized by population magnitude and overlaid on a geographic projection. Countries are colored green if they have population data, red otherwise. The visualization uses d3.geoNaturalEarth1 for the map projection, d3.geoPath to render country boundaries, and d3.scaleSqrt for circle radii based on population values. Data comes from UN Population Estimates 2017 Medium Variant, processed with TopoJSON and d3.csv, with zoom functionality via d3.zoom.

Nnkohdatavis

Circles on A Map

This visualization displays global population estimates for 2018 by drawing semi-transparent circles on a natural Earth projection map, with each circle positioned at a country's centroid and sized proportionally to its population. The map also includes a size legend and color legend for reference. Built with D3 v5, it uses `d3.geoNaturalEarth1` and `d3.geoPath` for map rendering, `d3.scaleSqrt` for circle sizing, and `d3.zoom` for interactivity. Population data comes from a UN dataset, with geographic boundaries from TopoJSON, and all elements are rendered as SVG.

MMuhammad Jarir Kanji