Annotations in EJ2 JavaScript Maps control

27 Apr 202311 minutes to read

Annotations are used to mark the specific area of interest in the Maps with texts, shapes, or images. Any number of annotations can be added to the Maps component.

Annotation

By using the content property of annotation, text content or id of an element or an HTML string can be specified to render a new HTML element in Maps.

<script id='annotation' type="text/x-template">
    <div id='template'>
        <img src='src/maps/images/flight.png'>
    </div>
</script>


var maps = new ej.maps.Maps({
    annotations: [
        {
            content: '#annotation',
            x: '0%', y: '50%'
        }
    ],
    layers: [
        {
            shapeData: world_map,
        }
    ]
});
maps.appendTo('#element');

Annotation customization

Changing the z-index

The stack order of an annotation element can be changed using the zIndex property in the annotation.

var map = new ej.maps.Maps({
    annotations: [{
        content: '<div id="first"><h1>Maps</h1></div>',
        x: '0%', y: '50%',
        zIndex: '-1'
    }],
    layers: [{
        shapeData: world_map
    }]
});
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="world-map.js"></script>


    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>

    <div id="container" style="height: 500px; width: 700px">
        <div id="element"></div>
    </div>

    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Positioning an Annotation

Annotations can be placed anywhere in the Maps by specifying pixel or percentage values to the x and y properties in the annotation.

var map = new ej.maps.Maps({
    annotations: [{
        content: '<div id="first"><h1>Maps</h1></div>',
        x: '20%', y: '50%',
        zIndex: '-1'
    }],
    layers: [{
        shapeData: world_map
    }]
});
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="world-map.js"></script>

    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>

    <div id="container" style="height: 500px; width: 700px">
        <div id="element"></div>
    </div>

    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Alignment of an Annotation

Annotations can be aligned using the horizontalAlignment and verticalAlignment properties in the annotation. The possible values can be Center, Far, Near and None.

var map = new ej.maps.Maps({
    annotations: [{
        content: '<div id="first"><h1>Maps</h1></div>',
        verticalAlignment: 'Center',
        horizontalAlignment: 'Center',
        x: '20%', y: '50%',
        zIndex: '-1'
    }],
    layers: [{
        shapeData: world_map
    }]
});
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="world-map.js"></script>

    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>

    <div id="container" style="height: 500px; width: 700px">
        <div id="element"></div>
    </div>


    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Multiple Annotation

Multiple annotations can be added to the Maps using the annotations and customization for the annotations can be done with this property.

var map = new ej.maps.Maps({
    annotations: [{
        content: '<div id="first"><h1>Maps-Annotation</h1></div>',
        x: '50%', y: '0%',
        zIndex: '-1'
    },
    {
        content: '<div id="first"><h1>Maps</h1></div>',
        x: '20%', y: '50%',
        zIndex: '-1'
    }],
   layers: [{
        shapeData: world_map
    }]
});
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="world-map.js"></script>

    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>

    <div id="container" style="height: 500px; width: 700px">
        <div id="element"></div>
    </div>

    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>