如何在openlayers中的點之間添加線條

Question

我正在嘗試在地圖上的兩點之間添加一條線。 我有以下代碼，但網頁只顯示我沒有我想要的行的基本地圖。

如何將此行添加到OpenLayers地圖？

  var map = new ol.Map({
    target: 'map',
    layers: [
      new ol.layer.Tile({
        source: new ol.source.OSM()
      })
    ],
    view: new ol.View({
      center: ol.proj.fromLonLat([ -95.36,29.75]),
      zoom: 10
    })
  });
    var coords = [[-95.36,29.75], [-96.36,30.75]];
    var lineString = new ol.geom.LineString(coords);
    // transform to EPSG:3857
    lineString.transform('EPSG:4326', 'EPSG:3857');

    // create the feature
    var feature = new ol.Feature({
        geometry: lineString,
        name: 'Line'
    });

    var lineStyle = new ol.style.Style({
        stroke: new ol.style.Stroke({
            color: '#ffcc33',
            width: 10
        })
    });

    var raster = new ol.layer.Tile({
      source: new ol.source.MapQuest({layer: 'sat'})
    });
    var source = new ol.source.Vector({
        features: [feature]
    });
    var vector = new ol.layer.Vector({
        source: source,
        style: [lineStyle]
    });
    map.addLayer(vector);
</script>

`

Answer 1

您的代碼包含OpenLayers v5.x中的javascript錯誤（以及v4.6.5中未出現的v4.6.5）：

Uncaught TypeError: ol.source.MapQuest is not a constructor

刪除指定以下內容的代碼：

var raster = new ol.layer.Tile({
  source: new ol.source.MapQuest({layer: 'sat'})
});

並顯示該行。

概念證明小提琴

代碼段：

 var map = new ol.Map({ target: 'map', layers: [ new ol.layer.Tile({ source: new ol.source.OSM() }) ], view: new ol.View({ center: ol.proj.fromLonLat([-95.36, 29.75]), zoom: 10 }) }); var coords = [ [-95.36, 29.75], [-96.36, 30.75] ]; var lineString = new ol.geom.LineString(coords); // transform to EPSG:3857 lineString.transform('EPSG:4326', 'EPSG:3857'); // create the feature var feature = new ol.Feature({ geometry: lineString, name: 'Line' }); var lineStyle = new ol.style.Style({ stroke: new ol.style.Stroke({ color: '#ffcc33', width: 10 }) }); var source = new ol.source.Vector({ features: [feature] }); var vector = new ol.layer.Vector({ source: source, style: [lineStyle] }); map.addLayer(vector); 

 html, body, #map { height: 100%; width: 100%; margin: 0px; padding: 0px; } 

 <link rel="stylesheet" href="https://openlayers.org/en/v5.2.0/css/ol.css" type="text/css"> <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.2.0/build/ol.js"></script> <div id="map" class="map"></div>