javascript - 更改 Google GeoMap 中的默认标记

Question

我使用 Google Charts API，而不是 Maps。我有这个功能。我想让标记动画，所以我想将默认圆圈更改为 gif 图像。我该怎么做？可能吗？

google.charts.load('current', {
  callback: function () {
    var chart = new window.google.visualization.GeoChart(document.getElementById('chart_div'));
    var options = {
        displayMode: 'markers',
        sizeAxis: {
            minSize: 3
        },
        backgroundColor: {
            fill: '#303030'
        },
        colorAxis: {
            colors: ['#FBFE72', '#FEB86B', '#EE683C']
        },
        legend: 'none',
        region: 'US',
        datalessRegionColor: '#289499'
    };
    var data;
    data = new window.google.visualization.DataTable();
    data.addColumn('number', 'Lat');
    data.addColumn('number', 'Long');
    data.addColumn('string', 'Name');
    data.addColumn('number', 'Count');
    data.addRows(1);
    data.setValue(0, 0, -120);
    data.setValue(0, 1, 2);
    data.setValue(0, 2, 'Test');
    data.setValue(0, 3, 1);

    chart.draw(data, options);
  },
  packages:['geochart']
});

<script src="https://www.gstatic.com/charts/loader.js"></script>
<script src="https://www.google.com/jsapi"></script>
<div id="chart_div"></div>