A9-US Choropleth Map

100%

A9-US Choropleth Map

✓ Published1🌍 Public

Last edited Apr 14, 2025

Created on Apr 14, 2025

This animated choropleth map displays the 2020 census population for each U.S. state, using a color scale to encode population values with interactive tooltips. The visualization loads population data from a CSV file and U.S. state boundaries from TopoJSON, then uses `d3.geoAlbersUsa()` for the projection and `d3.geoPath()` to render the SVG paths. State polygons are colored by population via a color scale, with a tooltip showing details on hover.

AI-generated description

MIT Licensed

Similar vizzes

Loading thumbnail…

A9- Choropleth Map

This choropleth map visualizes US state populations using a purple color scale, with states lacking data rendered in gray. Built with D3.js, it loads GeoJSON and CSV data via `d3.json` and `d3.csv`, then draws state boundaries with `d3.geoPath` and `topojson.feature`. A quantized color scale (`d3.scaleQuantize`) maps population values to fills, and a legend with thresholds is rendered using `d3.pairs` and `d3.format`. The map is rendered as SVG with white state borders, and the legend sits in the lower right corner.

SSukhraj Singh

88% match

Loading thumbnail…

[A9] US Population 2020(Choropleth Map)

This choropleth map displays the population of each US state for 2020, using a green color scale with thresholds that categorize states from under 50,000 to over 30 million residents. The map is rendered as an SVG using the D3.js v7 library, with state boundaries drawn via `d3.geoPath()` and a Mercator projection centered on the continental US. Population data is loaded from an external CSV and joined to GeoJSON state features by area name, enabling tooltips that show each state's population on hover. The map employs D3's threshold scale and sequential color scheme to visually encode population density.

Cctan13@dons.usfca.edu

87% match

Loading thumbnail…

A9 Choropleth Map w/ Tooltips D3

A choropleth map of the United States colors each state according to its cost-of-living index from a CSV of expensive states, with tooltips revealing additional cost rank details on hover. The visualization uses D3 v7 and TopoJSON to load and render state boundaries via `d3.geoPath` with an Albers USA projection. A sequential blue color scale maps cost index values, while an interactive tooltip div appears on mouseover to show state-specific data.

Nnathanjmuljadi@gmail.com

87% match

Loading thumbnail…

State Map with Population

This choropleth map visualizes U.S. state populations, filling each state with a blue color scale from light to dark based on its population value. It uses d3.geoAlbersUsa for projection and d3.geoPath to render TopoJSON state and nation outlines from the us-atlas dataset. Population data is loaded from a separate text file and parsed into a lookup table, with tooltips appearing on hover. The visualization is built with D3 v7 and rendered as SVG.

Sson.sultan@yahoo.com

87% match

Loading thumbnail…

usapopulation_map

This choropleth map of the United States visualizes estimated 2020 state populations in millions, using a blue sequential color scale to encode values. Built with D3 v7 and the TopoJSON library, it projects state boundaries with an Albers USA projection through `d3.geoPath`. The map reads population data from a hardcoded JavaScript object and renders an interactive SVG where hovering over a state displays its name and population in a tooltip.

CCharith Kapuluru

87% match

Loading thumbnail…

Choropleth population map

A choropleth map of the United States displays state-level population counts from 1990, using a color gradient from light orange to dark red. The map is rendered as SVG with D3 v3, leveraging `d3.geo.path` and TopoJSON for state boundaries. Population data from a CSV file is joined to state IDs, and a custom `d3.scale.quantize` interpolates colors across 100 steps. Hovering over a state triggers a tooltip and animates opacity, while the legend and interactivity are built with jQuery and D3 transitions.

Vvishusikka

86% match

Loading thumbnail…

US Map

A choropleth map of the United States colors individual states by population, using a threshold color scale that ranges from light yellow to dark amber. The visualization loads US state boundaries from the us-atlas TopoJSON file and renders them as SVG paths via d3.geoPath with an Albers USA projection. Population values are mapped to FIPS codes using a JavaScript Map, and the d3.scaleThreshold assigns fill colors based on population brackets. Hovering over a state triggers a native SVG title tooltip displaying the FIPS code and population figure.

KKOLLIPATI NIKHIL

85% match

Loading thumbnail…

Colm Lang | A9 Choropleth Map

This choropleth map displays U.S. state population estimates for 2020, with each state filled by a color from a five-step quantized scale. The visualization uses d3-geo with an Albers USA projection and d3.geoPath to render the states from a GeoJSON file, while population data is loaded from a CSV. A d3.legendColor legend, styled with ColorBrewer palettes, communicates the population ranges. Missing values render in light gray, and the SVG output includes a title for the legend.

CColm Lang

84% match