Cassie

@12cassie34·10 public vizzes

Let's make a map with D3.js!

This example displays a world map using a natural Earth projection, rendering countries as filled paths with a visible ocean sphere background. The map uses TopoJSON data from the World Atlas package, which is converted to GeoJSON via `feature`. The visualization is built with D3 v5, using `geoNaturalEarth1` for the projection, `geoPath` to generate SVG path data, and `select` to append the country and sphere elements to the SVG canvas.

Jan 19, 2022

Loading thumbnail…

Circles on a Map

This example displays a world map where each country is filled with a color based on its economy data from a UN dataset. Circles in a legend on the left indicate the color scale. The map uses the `geoPath` and `geoNaturalEarth1` projections from D3 v5, while the `topojson` library’s `feature` function processes the world atlas data. Country choropleth colors are set by a ternary, and the visualization supports zooming via the `zoom` API.

Oct 25, 2021

Loading thumbnail…

Scatter Plot with Menus

This scatter plot displays relationships between attributes of cars from the UCI Auto MPG dataset. Two dropdown menus let users select which numeric columns to compare on the x- and y-axes, updating the visualization accordingly. Built with D3 v5, the code uses `scaleLinear`, `axisBottom`, and `axisLeft` to render axes, while circles transition smoothly to new positions via `transition().duration()`. The `dropdownMenu` module handles menu creation, and SVG provides the rendering canvas.

Oct 25, 2021

Loading thumbnail…

Choropleth Map with Interactive filtering

This choropleth map displays global economic classifications by country, with an interactive color legend that enables filtering by category. Selecting a legend item highlights matching countries while dimming others, and clicking again clears the filter. The visualization uses d3.geoPath with a geoNaturalEarth1 projection to render world boundaries from TopoJSON data (World Atlas 50m), styled as SVG paths. The d3.scaleOrdinal with schemeSpectral drives the color encoding, while d3.zoom provides pan and zoom transformation on the map group.

Oct 24, 2021

Loading thumbnail…

Choropleth Map

This choropleth map visualizes countries’ economic classifications using a color scale based on the world-atlas TopoJSON dataset. The map renders with d3.geoPath and a natural Earth projection, while a d3.scaleOrdinal with schemeSpectral colors fills each country. Hovering highlights countries in pink, and a color legend explains the ordinal scale. Users can zoom and pan via d3.zoom, with all interaction and styling implemented in SVG.

Oct 23, 2021

Loading thumbnail…

Color and Size Legends

This example demonstrates two distinct legend types for different data encodings: a color legend with categorical swatches for fruits and a size legend with scaled circles for numeric values. Built with D3 v5, it renders SVG elements using reusable functions `colorLegend` and `sizeLegend`. The color legend uses `scaleOrdinal` with discrete colors, while the size legend employs `scaleSqrt` and generates ticks via `sizeScale.ticks()`. Both legends position circles and text labels with explicit spacing and offset values.

Oct 23, 2021

Loading thumbnail…

Tree Visualization of World Countries

This visualization displays the hierarchical relationship between world countries, continents, and subregions as a horizontal tree diagram. The code uses D3 v5’s `tree` and `hierarchy` layouts to compute node positions, with `linkHorizontal` generating curved connecting paths. Text labels show country names at varying font sizes based on tree depth. The SVG rendering supports zooming and panning through D3’s `zoom` behavior, and the data comes from a nested JSON file. The styling uses the IM Fell English SC font.

Oct 16, 2021

Loading thumbnail…

Art Tree

This radial tree diagram, titled "Art Tree," visualizes a hierarchical dataset of world regions and countries using a tidy tree layout. The visualization displays the nested structure from the world down to individual nations, with each node connected by a horizontal link. The D3.js library (v5) is used to load the JSON data, compute the tree layout, and generate SVG paths for the links, which are rendered within a rounded rectangular frame.

Oct 14, 2021

Loading thumbnail…

Blank Canvas

This example shows a full-screen, rounded rectangle that fills the browser window with a solid teal color, creating a minimal blank canvas. The visualization uses D3 v5 to select the SVG element and dynamically size it to the viewport dimensions. A single `<rect>` is appended and styled with a 40-pixel corner radius and a muted blue-gray fill, with the body fixed to prevent scrolling.

Oct 13, 2021

Loading thumbnail…

Cheap Tricks for Interaction

This interactive map visualizes world countries using D3 v5 with a natural Earth projection, rendered as SVG paths with hover highlighting and zoom/pan capabilities. It loads geographic data from the world-atlas TopoJSON and country names from a TSV file, attaching tooltips via SVG `<title>` elements. The code uses `d3.geoPath`, `d3.geoNaturalEarth1`, `d3.zoom`, and `topojson.feature` to enable smooth interaction and clear country identification.

Oct 13, 2021