載入wkt到地圖 Demo (可直接執行)
阿新 • • 發佈:2020-11-12
<!DOCTYPE html> <html> <head> <title>WKT</title> <link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" type="text/css"> <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script> <script type="text/javascript" src="https://openlayers.org/en/v5.3.0/build/ol.js"></script> </head> <body> <div id="map" class="map"></div> <script> // 底圖 var raster = new ol.layer.Tile({ source: new ol.source.OSM() }); var wkt = 'POLYGON((10.689 -25.092, 34.595 ' + '-20.170, 38.814 -35.639, 13.502 ' + '-39.155, 10.689 -25.092))'; var format = new ol.format.WKT(); // wkt轉feature var feature = format.readFeature(wkt, { dataProjection: 'EPSG:4326', // 目標座標系 featureProjection: 'EPSG:3857'// 當前座標系 }); // wkt轉feature構建向量圖 var vector = new ol.layer.Vector({ source: new ol.source.Vector({ features: [feature] }) }); // 將兩個圖層加到地圖物件 var map = new ol.Map({ layers: [raster, vector], target: 'map', view: new ol.View({ center: [2952104.0199, -3277504.823], zoom: 4 }) }); </script> </body> </html>