Example of using the WKT parser.
Create features from geometries in WKT (Well Known Text) format.
import 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import WKT from 'ol/format/WKT';
import {OSM, Vector as VectorSource} from 'ol/source';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer';
const raster = new TileLayer({
source: new OSM(),
});
const wkt =
'POLYGON((10.689 -25.092, 34.595 ' +
'-20.170, 38.814 -35.639, 13.502 ' +
'-39.155, 10.689 -25.092))';
const format = new WKT();
const feature = format.readFeature(wkt, {
dataProjection: 'EPSG:4326',
featureProjection: 'EPSG:3857',
});
const vector = new VectorLayer({
source: new VectorSource({
features: [feature],
}),
});
const map = new Map({
layers: [raster, vector],
target: 'map',
view: new View({
center: [2952104.0199, -3277504.823],
zoom: 4,
}),
});
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>WKT</title>
<!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
<script src="https://unpkg.com/elm-pep"></script>
<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
<script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,URL,TextDecoder,Number.isInteger"></script>
<style>
.map {
width: 100%;
height:400px;
}
</style>
</head>
<body>
<div id="map" class="map"></div>
<script src="main.js"></script>
</body>
</html>
{
"name": "wkt",
"dependencies": {
"ol": "6.6.1"
},
"devDependencies": {
"parcel": "^2.0.0-beta.1"
},
"scripts": {
"start": "parcel index.html",
"build": "parcel build --public-url . index.html"
}
}