How to Create Maps with Polygon Shapes in React?
The Syncfusion React Maps component supports adding polygon shapes to visualize closed areas on a map, such as a country or a floor plan, by connecting multiple latitude and longitude points. These polygons are useful for highlighting, visualizing, and defining the boundaries of specific geographic regions. This section explains how to create maps with polygon shapes in a React application using the Syncfusion Maps component.
Polygon shapes can be rendered on the map layer by specifying the latitude and longitude values in the points property within the polygons property of the map’s layer, which defines the polygon shape. The rendered polygon shape can be customized using the properties within the polygons property.
The following code sample demonstrates how to add a polygon shape in React Maps.
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>Syncfusion React Chart-Add DataSource</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="description" content="Essential JS 2 for React Components" />
<meta name="author" content="Syncfusion" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
<script src="systemjs.config.js"></script>
<style>
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
#container {
height : 500px;
display: block;
}
</style>
</head>
<body style="margin-top: 100px;">
<div id='container'>
<div id='loader'>Loading....</div>
</div>
</body>
</html>
index.js
import { world_map } from './world-map.ts';
import * as React from "react";
import { createRoot } from 'react-dom/client';
import { MapsComponent, LayersDirective, LayerDirective, Inject, Polygon } from '@syncfusion/ej2-react-maps';
export function App() {
var polygonSettings = {
polygons: [
{
points: [
{ longitude: 34.88539587371454, latitude: 28.181421087099537 },
{ longitude: 37.50029619722466, latitude: 24.299419888989462 },
{ longitude: 39.22241423764024, latitude: 22.638529461838658 },
{ longitude: 38.95650769309776, latitude: 21.424998160017495 },
{ longitude: 40.19963938650778, latitude: 20.271205391339606 },
{ longitude: 41.76547269134551, latitude: 18.315451049867193 },
{ longitude: 42.78452077838921, latitude: 16.097235052947966 },
{ longitude: 43.36984949591576, latitude: 17.188572054533054 },
{ longitude: 44.12558191797012, latitude: 17.407258102232234 },
{ longitude: 46.69027032797584, latitude: 17.33342243475734 },
{ longitude: 47.09312386141585, latitude: 16.97087769526452 },
{ longitude: 48.3417299826302, latitude: 18.152700711188004 },
{ longitude: 49.74762591400318, latitude: 18.81544363931681 },
{ longitude: 52.41428026336621, latitude: 18.9035706497573 },
{ longitude: 55.272683129240335, latitude: 20.133861012918544 },
{ longitude: 55.60121336079203, latitude: 21.92042703112351 },
{ longitude: 55.08204399107967, latitude: 22.823302662258882 },
{ longitude: 52.743894337844154, latitude: 22.954463486477437 },
{ longitude: 51.47035908651375, latitude: 24.35818837668566 },
{ longitude: 51.122553219055874, latitude: 24.666679732426346 },
{ longitude: 51.58731671256831, latitude: 25.173806925822717 },
{ longitude: 51.35950585992913, latitude: 25.84556484481108 },
{ longitude: 51.088770529661275, latitude: 26.168494193631147 },
{ longitude: 50.78527056538036, latitude: 25.349051242147596 },
{ longitude: 50.88330288802666, latitude: 24.779242606720743 },
{ longitude: 50.19702490702369, latitude: 25.66825106363693 },
{ longitude: 50.066461167339924, latitude: 26.268905608606616 },
{ longitude: 49.645896067213215, latitude: 27.15116474192905 },
{ longitude: 48.917371072320805, latitude: 27.55738830340198 },
{ longitude: 48.3984720209192, latitude: 28.566207269716173 },
{ longitude: 47.68851714518985, latitude: 28.5938991332588 },
{ longitude: 47.45059089191449, latitude: 29.009321449856984 },
{ longitude: 44.73549453609391, latitude: 29.157358362696385 },
{ longitude: 41.79487372890989, latitude: 31.23489959729713 },
{ longitude: 40.36977176033773, latitude: 31.9642352513131 },
{ longitude: 39.168270913149826, latitude: 32.18348471414393 },
{ longitude: 37.019253492546454, latitude: 31.47710220862595 },
{ longitude: 37.99644645508337, latitude: 30.4851028633376 },
{ longitude: 37.67756530485232, latitude: 30.3636358598429 },
{ longitude: 37.50181466030105, latitude: 29.960155516804974 },
{ longitude: 36.700288181129594, latitude: 29.882136586478993 },
{ longitude: 36.100009274845206, latitude: 29.15308642012721 },
{ longitude: 34.85774476486728, latitude: 29.3103032832622 },
{ longitude: 34.64498583263142, latitude: 28.135787235699823 },
{ longitude: 34.88539587371454, latitude: 28.181421087099537 }
],
fill: 'red',
opacity: 0.7,
borderColor: 'green',
borderWidth: 2,
borderOpacity: 0.7
}
]
};
return (
<MapsComponent >
<Inject services={[Polygon]} />
<LayersDirective>
<LayerDirective shapeData={world_map} polygonSettings={polygonSettings}
>
</LayerDirective>
</LayersDirective>
</MapsComponent>
);
}
const root = createRoot(document.getElementById('container'));
root.render(<App />);
The following screenshot illustrates the output of the above code snippet.
Conclusion
I hope you enjoyed learning how to add polygon shapes using the React Maps component.
You can refer to our React Maps feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our React Maps example to understand how to create and visualize data.
For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.
If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!
