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Multiclass Density Maps

teaser

What is This?

Density maps (also known as density plots, binned scatterplots, and heatmaps) are our best friend to scale scatterplots. However, it is nontrivial to visualize multiclass data on density maps. Actually, various designs have been used (see the picture above). In this work, we unified those various designs into a single model, the Class Buffer Model.

Interactive Demos

Reference

J. Jo, F. Vernier, P. Dragicevic and J. Fekete, "A Declarative Rendering Model for Multiclass Density Maps," in IEEE Transactions on Visualization and Computer Graphics. doi: 10.1109/TVCG.2018.2865141 pdf (hal)

Integration with Your Code

Install via npm:

npm install multiclass-density-maps --save

and import it in your code:

import * as MDM from 'multiclass-density-maps';

Parse and render a specification:

let spec = // enter your JSON speficiation here.

let config = new MDM.Config(spec); // parse the specification

config.load().then(() => { // load the data
    let interp = new MDM.Interpreter(config); // create an interpreter

    interp.interpret(); // interpret the specification

    interp.render(document.getElementsByTagName('div')[0]); // render it to a div element.
})

See our wiki! https://github.com/e-/Multiclass-Density-Maps/wiki

Development

Install NodeJS and NPM from https://nodejs.org/en/download/

Clone the repo:

git clone https://github.com/e-/Multiclass-Density-Maps.git
cd Multiclass-Density-Maps

Install the dependencies:

npm install

Start the dev server:

npm start

Open the address that the server gives and navigate to index.html.

FAQ

  1. Problems when installing topojson: Try npm install topojson --no-bin-links.

  2. How can I use my own data?: Here are some examples using different data sources: https://github.com/e-/Multiclass-Density-Maps/tree/master/data