Question

我无法将Geochart Markers加载到地图上。 Google提供的脚本会在我的网站上呈现一张空白地图，但标记和地图会在jsfiddle上显示。任何帮助将不胜感激。

以下是代码：

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script> 
<script type="text/javascript" src="https://www.google.com/jsapi"></script>

<script type="text/javascript">

google.charts.load('current', {'packages': ['geochart']});
google.charts.setOnLoadCallback(drawMarkersMap);

  function drawMarkersMap() {
  var data = google.visualization.arrayToDataTable([
    ['City', 'Collaborator'],
    ['Detroit', "text here"],
    ['Cleveland', "text here"],
    ['Joondalup', "text here"],
    ['Wanaka', "text here"]
    ['Liverpool', "text here"],
    ['Styria', "text here"],
    ['Edwardsville', "text here"],
    ['Austin', "text here"],
    ['Houston', "text here"],
    ['Stockholm', "text here"],
    ]);

  var options = {
    region: 'world',
    displayMode: 'markers',
    backgroundColor: '#252426',
    colorAxis: {colors: ['blue']},
    magnifyingGlass: {enable: false},
    defaultColor: '#f1910e',
    enableRegionInteractivity: 'true',
     };

  var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
  chart.draw(data, options);
};
</script>

Answer 1

我明白了！显然谷歌现在需要一个API密钥才能在地理标志上显示标记。这是经过修改的功能性脚本。第二行是唯一的变化。

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script> 
<script type="text/javascript" src="//maps.googleapis.com/maps/api/js?key=YOUR_API_KEY_GOES_HERE" async="" defer="defer"></script>

<script type="text/javascript">

google.charts.load('current', {'packages': ['geochart']});
google.charts.setOnLoadCallback(drawMarkersMap);

function drawMarkersMap() {
var data = google.visualization.arrayToDataTable([
['City', 'Collaborator'],
['Detroit', "text here"],
['Cleveland', "text here"],
['Joondalup', "text here"],
['Wanaka', "text here"]
['Liverpool', "text here"],
['Styria', "text here"],
['Edwardsville', "text here"],
['Austin', "text here"],
['Houston', "text here"],
['Stockholm', "text here"],
]);

var options = {
region: 'world',
displayMode: 'markers',
backgroundColor: '#252426',
colorAxis: {colors: ['blue']},
magnifyingGlass: {enable: false},
defaultColor: '#f1910e',
enableRegionInteractivity: 'true',
};

var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
chart.draw(data, options);
};
</script>

如果您的网站没有收到太多流量，那么API密钥可以通过Google免费获得。您需要注册一个＆＃34;浏览器密钥＆＃34;。这是设置它的链接： https://developers.google.com/maps/documentation/javascript/get-api-key

Answer 2

根据此forum，您的网络可能会阻止地理编码。 GeoChart需要对标记进行地理编码，以便知道绘制它们的位置。

检查此相关的SO thread和example from GitHub。

function drawVisualization() {
  var data = google.visualization.arrayToDataTable([
    ['State', 'Foo Factor'],
    ['US-IL', 200],
    ['US-IN', 300],
    ['US-IA', 20],
    ['US-RI', 150]
  ]);

  var geochart = new google.visualization.GeoChart(
      document.getElementById('visualization'));
  geochart.draw(data, {width: 556, height: 347, region: "US", resolution: "provinces"});
}

希望这有帮助！

标记不会出现在GeoChart上，但地图显示得很好

2 个答案: