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Vector Map

Palette

Documentation

This demo shows how to color specific map areas using a palette. In the VectorMap widget, a palette defines a range of colors that are used to paint areas. This range is divided into segments using the value assigned to the colorGroups option. Each segment contributes a color into an array of colors.

The map in this demo represents the top 40 countries by population. Map areas are colored according to the percentage of population.

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import React from 'react'; import VectorMap, { Layer, Legend, Source } from 'devextreme-react/vector-map'; import * as mapsData from 'devextreme/dist/js/vectormap-data/world.js'; import { populations } from './data.js'; const colorGroups = [0, 0.5, 0.8, 1, 2, 3, 100]; const bounds = [-180, 85, 180, -60]; function App() { return ( <VectorMap id="vector-map" bounds={bounds}> <Layer dataSource={mapsData.world} palette="Violet" name="areas" colorGroupingField="population" colorGroups={colorGroups} customize={customizeLayer} > </Layer> <Legend customizeText={customizeText}> <Source layer="areas" grouping="color"></Source> </Legend> </VectorMap> ); } function customizeLayer(elements) { elements.forEach((element) => { element.attribute('population', populations[element.attribute('name')]); }); } function customizeText(arg) { let text; if (arg.index === 0) { text = '< 0.5%'; } else if (arg.index === 5) { text = '> 3%'; } else { text = `${arg.start}% to ${arg.end}%`; } return text; } export default App;
import React from 'react'; import ReactDOM from 'react-dom'; import App from './App.js'; ReactDOM.render( <App />, document.getElementById('app') );
<!DOCTYPE html> <html> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.4/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="styles.css" /> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import('./index.js'); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"></div> </div> </body> </html>
#vector-map { height: 440px; }
export const populations = { 'China': 19, 'India': 17.4, 'United States': 4.44, 'Indonesia': 3.45, 'Brazil': 2.83, 'Pakistan': 2.62, 'Nigeria': 2.42, 'Bangladesh': 2.18, 'Russia': 2.04, 'Japan': 1.77, 'Mexico': 1.67, 'Philippines': 1.39, 'Vietnam': 1.25, 'Ethiopia': 1.23, 'Egypt': 1.21, 'Germany': 1.13, 'Iran': 1.08, 'Turkey': 1.07, 'Congo (Kinshasa)': 0.94, 'France': 0.92, 'Thailand': 0.9, 'United Kingdom': 0.89, 'Italy': 0.85, 'Burma': 0.84, 'South Africa': 0.74, 'S. Korea': 0.7, 'Colombia': 0.66, 'Spain': 0.65, 'Tanzania': 0.63, 'Kenya': 0.62, 'Ukraine': 0.6, 'Argentina': 0.59, 'Algeria': 0.54, 'Poland': 0.54, 'Sudan': 0.52, 'Canada': 0.49, 'Uganda': 0.49, 'Iraq': 0.47, 'Morocco': 0.46, 'Uzbekistan': 0.43 };
System.config({ transpiler: 'plugin-babel', meta: { 'devextreme/dist/js/vectormap-data/*': { esModule: true } }, paths: { 'npm:': 'https://unpkg.com/' }, defaultExtension: 'js', map: { 'react': 'npm:react@16/umd/react.development.js', 'react-dom': 'npm:react-dom@16/umd/react-dom.development.js', 'prop-types': 'npm:prop-types/prop-types.js', 'devextreme': 'npm:devextreme@19.2', 'devextreme/dist/js/vectormap-data': 'npm:devextreme@19.2/dist/js/vectormap-data', 'devextreme-react': 'npm:devextreme-react@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram', 'devexpress-gantt': 'npm:devexpress-gantt', // SystemJS plugins 'plugin-babel': 'npm:systemjs-plugin-babel@0/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0/systemjs-babel-browser.js' }, packages: { 'devextreme': { defaultExtension: 'js' }, 'devextreme-react': { main: 'index.js' } }, babelOptions: { sourceMaps: false, stage0: true, react: true } });