Bubble in JavaScript Maps control

22 Jul 2021 / 4 minutes to read

Bubbles in the Maps control represent the underlying data values of the map. Bubbles are scattered throughout the map shapes that contains bound values.

Bubbles are included when data binding and the bubbleSettings is set to the shape layers.

To add bubbles to the map, bind data source to the layer bubbleSettings and set the valuePath as population. Following example illustrates bubble enable for the World map with datasource. To render bubble in maps need to inject Bubble module using Maps.Inject(Bubble) method.

export let world_map = // paste the World map from WorldMap.json Geo json file.

Source

Preview

index.ts

index.html

import { world_map } from './world-map.ts';
import { Maps, Bubble } from '@syncfusion/ej2-maps';
Maps.Inject(Bubble);
let map: Maps = new Maps({
    layers: [{
        shapeData: world_map,
        shapeDataPath: 'name',
        shapePropertyPath: 'name',
        bubbleSettings: [{
            visible: true,
            minRadius: 20,
            dataSource: [
                { name: 'India', population: '38332521' },
                { name: 'New Zealand', population: '19651127' },
                { name: 'Pakistan', population: '3090416' }
            ],
            maxRadius: 40,
            valuePath: 'population'
        }]
    }]
});
map.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Maps</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="world-map.js"></script>
    <script src="usa.js"></script>
    <script src="data.js"></script>
    <script src="california.js"></script>
    <script src="texas.js"></script>
    <script src="africa_continent.js"></script>
    <script src="africa.js"></script>
    <script src="cluster.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container' style="height: 500px; width: 700px">
        <div id='element'></div>
    </div>
    <svg height="150" width="400">
        <defs>
            <linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
                <stop offset="0%" style="stop-color:#C5494B;stop-opacity:1" />
                <stop offset="100%" style="stop-color:#4C134F;stop-opacity:1" />
            </linearGradient>
        </defs>
    </svg>
    <!-- annotation content -->
    <div id="maps-annotation" style="display: none;">
        <div id="annotation">
            <div>
                <p style="margin-left:10px;font-size:13px;font-weight:500">Facts about Africa</p>
            </div>
            <hr style="margin-top:-3px;margin-bottom:10px;border:0.5px solid #DDDDDD">
            <div>
                <ul style="list-style-type:disc; margin-left:-20px;margin-bottom:2px; font-weight:400">
                    <li>Africa is the second largest and second most populated continent in the world.</li>
                    <li style="padding-top:5px;">Africa has 54 sovereign states and 10 non-sovereign territories.</li>
                    <li style="padding-top:5px;">Algeria is the largest country in Africa, where as Mayotte is the smallest.</li>
                </ul>
            </div>
        </div>
    </div>
    <style>
        #annotation {
            color: #DDDDDD;
            font-size: 12px;
            font-family: Roboto;
            background: #3E464C;
            margin: 20px;
            padding: 10px;
            -webkit-border-radius: 2px;
            -moz-border-radius: 2px;
            border-radius: 2px;
            width: 300px;
            -moz-box-shadow: 0px 2px 5px #666;
            -webkit-box-shadow: 0px 2px 5px #666;
            box-shadow: 0px 2px 5px #666;
        }
        .country-label {
            color: white;
            font-size: 25px;
        }
    </style>
</body>

</html>

Bubble Sizing

Using the minRadius and maxRadius properties in bubbleSettings, you can render the bubbles in different sizes based on the valuePath and dataSource values

Source

Preview

index.ts

index.html

import { world_map } from './world-map.ts';
import { Maps, Bubble } from '@syncfusion/ej2-maps';
Maps.Inject(Bubble);
let map: Maps = new Maps({
    layers: [{
        shapeData: world_map,
        shapeDataPath: 'name',
        shapePropertyPath: 'name',
        bubbleSettings: [{
            visible: true,
            minRadius: 5,
            dataSource: [
                { name: 'India', population: '38332521' },
                { name: 'New Zealand', population: '19651127' },
                { name: 'Pakistan', population: '3090416' }
            ],
            maxRadius: 80,
            valuePath: 'population'
        }]
    }]
});
map.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Maps</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="world-map.js"></script>
    <script src="usa.js"></script>
    <script src="data.js"></script>
    <script src="california.js"></script>
    <script src="texas.js"></script>
    <script src="africa_continent.js"></script>
    <script src="africa.js"></script>
    <script src="cluster.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container' style="height: 500px; width: 700px">
        <div id='element'></div>
    </div>
    <svg height="150" width="400">
        <defs>
            <linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
                <stop offset="0%" style="stop-color:#C5494B;stop-opacity:1" />
                <stop offset="100%" style="stop-color:#4C134F;stop-opacity:1" />
            </linearGradient>
        </defs>
    </svg>
    <!-- annotation content -->
    <div id="maps-annotation" style="display: none;">
        <div id="annotation">
            <div>
                <p style="margin-left:10px;font-size:13px;font-weight:500">Facts about Africa</p>
            </div>
            <hr style="margin-top:-3px;margin-bottom:10px;border:0.5px solid #DDDDDD">
            <div>
                <ul style="list-style-type:disc; margin-left:-20px;margin-bottom:2px; font-weight:400">
                    <li>Africa is the second largest and second most populated continent in the world.</li>
                    <li style="padding-top:5px;">Africa has 54 sovereign states and 10 non-sovereign territories.</li>
                    <li style="padding-top:5px;">Algeria is the largest country in Africa, where as Mayotte is the smallest.</li>
                </ul>
            </div>
        </div>
    </div>
    <style>
        #annotation {
            color: #DDDDDD;
            font-size: 12px;
            font-family: Roboto;
            background: #3E464C;
            margin: 20px;
            padding: 10px;
            -webkit-border-radius: 2px;
            -moz-border-radius: 2px;
            border-radius: 2px;
            width: 300px;
            -moz-box-shadow: 0px 2px 5px #666;
            -webkit-box-shadow: 0px 2px 5px #666;
            box-shadow: 0px 2px 5px #666;
        }
        .country-label {
            color: white;
            font-size: 25px;
        }
    </style>
</body>

</html>

Multiple bubble groups

You can specify multiple types of bubble groups using the bubbleSettings property and customize it according to your requirement.

In the following code example, the gender-wise population ratio is demonstrated with two different bubble groups.

Source

Preview

index.ts

index.html

import { world_map } from './world-map.ts';
import { Maps, Bubble } from '@syncfusion/ej2-maps';
Maps.Inject(Bubble);
let map: Maps = new Maps({
    layers: [{
        shapeData: world_map,
        shapeDataPath: 'name',
        shapePropertyPath: 'name',
        bubbleSettings: [{
            visible: true,
            minRadius: 5,
            valuePath: "femaleRatio"
            colorValuePath: "femaleRatioColor"
            dataSource: [
                {
                    country: "United States", femaleRatio: 50.50442726, maleRatio: 49.49557274, femaleRatioColor: "green", maleRatioColor: "blue"
                },
                {
                    country: "India", femaleRatio: 48.18032713, maleRatio: 51.81967287, femaleRatioColor: "blue", maleRatioColor: "#c2d2d6"
                },
                {
                    country: "Oman", femaleRatio: 34.15597234, maleRatio: 65.84402766, femaleRatioColor: "#09156d", maleRatioColor: "orange"
                },
                {
                    country: "United Arab Emirates", femaleRatio: 27.59638942, maleRatio: 72.40361058, femaleRatioColor: "#09156d", maleRatioColor: "orange"
                }
            ],
            maxRadius: 20,
        },
        {
            visible: true,
            bubbleType: 'Circle'
            opacity: 0.4,
            minRadius: 15,
            valuePath: "maleRatio",
            colorValuePath: "maleRatioColor",
            dataSource: [
                {
                    country: "United States", femaleRatio: 50.50442726, maleRatio: 49.49557274, femaleRatioColor: "green", maleRatioColor: "blue"
                },
                {
                    country: "India", femaleRatio: 48.18032713, maleRatio: 51.81967287, femaleRatioColor: "blue", maleRatioColor: "#c2d2d6"
                },
                {
                    country: "Oman", femaleRatio: 34.15597234, maleRatio: 65.84402766, femaleRatioColor: "#09156d", maleRatioColor: "orange"
                },
                {
                    country: "United Arab Emirates", femaleRatio: 27.59638942, maleRatio: 72.40361058, femaleRatioColor: "#09156d", maleRatioColor: "orange"
                }
            ],
            maxRadius: 25,
        }]
    }]
});
map.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Maps</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="world-map.js"></script>
    <script src="usa.js"></script>
    <script src="data.js"></script>
    <script src="california.js"></script>
    <script src="texas.js"></script>
    <script src="africa_continent.js"></script>
    <script src="africa.js"></script>
    <script src="cluster.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container' style="height: 500px; width: 700px">
        <div id='element'></div>
    </div>
    <svg height="150" width="400">
        <defs>
            <linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
                <stop offset="0%" style="stop-color:#C5494B;stop-opacity:1" />
                <stop offset="100%" style="stop-color:#4C134F;stop-opacity:1" />
            </linearGradient>
        </defs>
    </svg>
    <!-- annotation content -->
    <div id="maps-annotation" style="display: none;">
        <div id="annotation">
            <div>
                <p style="margin-left:10px;font-size:13px;font-weight:500">Facts about Africa</p>
            </div>
            <hr style="margin-top:-3px;margin-bottom:10px;border:0.5px solid #DDDDDD">
            <div>
                <ul style="list-style-type:disc; margin-left:-20px;margin-bottom:2px; font-weight:400">
                    <li>Africa is the second largest and second most populated continent in the world.</li>
                    <li style="padding-top:5px;">Africa has 54 sovereign states and 10 non-sovereign territories.</li>
                    <li style="padding-top:5px;">Algeria is the largest country in Africa, where as Mayotte is the smallest.</li>
                </ul>
            </div>
        </div>
    </div>
    <style>
        #annotation {
            color: #DDDDDD;
            font-size: 12px;
            font-family: Roboto;
            background: #3E464C;
            margin: 20px;
            padding: 10px;
            -webkit-border-radius: 2px;
            -moz-border-radius: 2px;
            border-radius: 2px;
            width: 300px;
            -moz-box-shadow: 0px 2px 5px #666;
            -webkit-box-shadow: 0px 2px 5px #666;
            box-shadow: 0px 2px 5px #666;
        }
        .country-label {
            color: white;
            font-size: 25px;
        }
    </style>
</body>

</html>

Enable Legend for Bubble

To enable the legend for the bubble, need to set legendSettings.visible as true and legendSettings.type as ‘Bubbles’. To render the legend in maps need to Inject Legend module using Maps.Inject(Legend) method. Refer the below code snippet to enable the legend for bubbles with each bubble different colors rendering.

Source

Preview

index.ts

index.html

import { world_map } from './world-map.ts';
import { Maps, Bubble, Legend} from '@syncfusion/ej2-maps';
Maps.Inject(Bubble, Legend);
let map: Maps = new Maps({
    legendSettings: {
      visible: true,
      type: 'Bubbles'
    },
    layers: [{
        shapeData: world_map,
        shapeDataPath: 'name',
        shapePropertyPath: 'name',
        bubbleSettings: [{
            visible: true,
            minRadius: 20,
            dataSource: [
                {color: 'green', name: 'India', population: '38332521' },
                {color: 'purple', name: 'New Zealand', population: '19651127' },
                {color: 'blue', name: 'Pakistan', population: '3090416' }
            ],
            maxRadius: 40,
            colorValuePath: 'color',
            valuePath: 'population'
        }]
    }]
});
map.appendTo('#element');

<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Maps</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript UI Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="world-map.js"></script>
    <script src="usa.js"></script>
    <script src="data.js"></script>
    <script src="california.js"></script>
    <script src="texas.js"></script>
    <script src="africa_continent.js"></script>
    <script src="africa.js"></script>
    <script src="cluster.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container' style="height: 500px; width: 700px">
        <div id='element'></div>
    </div>
    <svg height="150" width="400">
        <defs>
            <linearGradient id="grad1" x1="0%" y1="0%" x2="0%" y2="100%">
                <stop offset="0%" style="stop-color:#C5494B;stop-opacity:1" />
                <stop offset="100%" style="stop-color:#4C134F;stop-opacity:1" />
            </linearGradient>
        </defs>
    </svg>
    <!-- annotation content -->
    <div id="maps-annotation" style="display: none;">
        <div id="annotation">
            <div>
                <p style="margin-left:10px;font-size:13px;font-weight:500">Facts about Africa</p>
            </div>
            <hr style="margin-top:-3px;margin-bottom:10px;border:0.5px solid #DDDDDD">
            <div>
                <ul style="list-style-type:disc; margin-left:-20px;margin-bottom:2px; font-weight:400">
                    <li>Africa is the second largest and second most populated continent in the world.</li>
                    <li style="padding-top:5px;">Africa has 54 sovereign states and 10 non-sovereign territories.</li>
                    <li style="padding-top:5px;">Algeria is the largest country in Africa, where as Mayotte is the smallest.</li>
                </ul>
            </div>
        </div>
    </div>
    <style>
        #annotation {
            color: #DDDDDD;
            font-size: 12px;
            font-family: Roboto;
            background: #3E464C;
            margin: 20px;
            padding: 10px;
            -webkit-border-radius: 2px;
            -moz-border-radius: 2px;
            border-radius: 2px;
            width: 300px;
            -moz-box-shadow: 0px 2px 5px #666;
            -webkit-box-shadow: 0px 2px 5px #666;
            box-shadow: 0px 2px 5px #666;
        }
        .country-label {
            color: white;
            font-size: 25px;
        }
    </style>
</body>

</html>

Refer the API for Bubble feature.

Contents

Bubble Sizing
Multiple bubble groups
Enable Legend for Bubble

Contents

Bubble Sizing
Multiple bubble groups
Enable Legend for Bubble

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