G2 - 地图与热力图

             <!DOCTYPE html>
    <html>
      <head>
        <meta charset="utf-8">
        <title>地图与热力图</title>
<script src="https://a.alipayobjects.com/jquery/jquery/1.11.1/jquery.js"></script>
<script src="https://gw.alipayobjects.com/as/g/datavis/g2/2.3.13/index.js"></script>
      </head>
      <body>
          <div id="c1"></div>
 <style type="text/css">
  #c1 {
    background-image: url(https://zos.alipayobjects.com/rmsportal/kqiqfRADgLgCCNJRHhDv.png);
    background-repeat: no-repeat;
    width: 650px;
    height: 450px;
    background-size: 100%;
    margin: 0 auto;
  }
</style>

<script>
$.getJSON('../../../static/data/china.json', function(mapData) {
  $.getJSON('../../../static/data/temp.json', function(data) {
    var Stat = G2.Stat;
    var chart = new G2.Chart({
      id: 'c1',
      width: 650,
      height: 450,
      plotCfg: {
        margin: [5, 185, 140, 53]
      }
    });
    chart.source(data, {
      'out-temperature': {
        alias: '室外温度'
      }
    });
    chart.coord('map', {
      projection: 'mercator',
      max: [134.77, 63.68],
      min: [73.60, 18.48]
    });
    chart.tooltip({
      map: {
        'title': 'city',
        value: 'out-temperature'
      }
    });
    chart.heatmap().position(Stat.map.location('longitude*latitude')).color('out-temperature', '#50a3ba-#eac736-#d94e5d')
      .size(15) //调整热力图一个点可以影响的范围
      .label('city',{label:{opacity: 0}}); // 设置文本但是不显示，使得tooltip可以显示对应的字段
    chart.render();
  });
});
</script>

      </body>
    </html>
          
        

地图与热力图

最开始的热力图，是矩形色块加上颜色编码。经过多年的演化，习语上的热力图，如今更规范，更被大多数人理解的是这种经过平滑模糊过的热力图谱。了解更多

<!DOCTYPE html>
    <html>
      <head>
        <meta charset="utf-8">
        <title>地图与热力图</title>
        <script src="https://unpkg.com/react@15/dist/react.min.js"></script>
        <script src="https://unpkg.com/react-dom@15/dist/react-dom.min.js"></script>
        <script src="https://a.alipayobjects.com/g/datavis/g2/2.3.13/g2.js"></script>
        <script src="https://unpkg.com/g2-react@1.2.0/dist/index.js"></script>
        <script src="https://cdn.bootcss.com/babel-core/5.8.38/browser.min.js"></script>
        <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
      </head>
      <body>
          <div id="c1"></div>
 <script type="text/babel">
    let mapData;
    const Chart = createG2(chart => {
      const Stat = G2.Stat;
      chart.col('out-temperature', {
        alias: '室外温度'
      });
      chart.coord('map', {
        projection: 'mercator',
        max: [134.77, 63.68],
        min: [73.60, 18.48]
      });
      chart.tooltip({
        map: {
          'title': 'city',
          value: 'out-temperature'
        }
      });
      chart.heatmap().position(Stat.map.location('longitude*latitude')).color('out-temperature', '#50a3ba-#eac736-#d94e5d')
        .size(15) //调整热力图一个点可以影响的范围
        .label('city',{label:{opacity: 0}}); // 设置文本但是不显示，使得tooltip可以显示对应的字段
      chart.render();
    });

const MyComponent = React.createClass({
      getInitialState() {
        return {
          data: [],
          width: 650,
          height: 450,
          plotCfg: {
            margin: [5, 185, 140, 53]
          }
        };
      },
      componentDidMount: function() {
        const self = this;
        axios.get('../../../static/data/china.json').then(function (response) {
          mapData = response.data;
        }).catch(function (error) {
          console.log(error);
        });
        axios.get('../../../static/data/temp.json').then(function (response) {
          self.setState({
            data: response.data
          });
        }).catch(function (error) {
          console.log(error);
        });
      },
      render() {
          return (
            <div>
              <Chart
                data={this.state.data}
                width={this.state.width}
                height={this.state.height}
                plotCfg={this.state.plotCfg}
                forceFit={this.state.forceFit} />
            </div>
          );
      },
    });
    ReactDOM.render(<MyComponent />, document.getElementById('c1'));
</script>

<div>
  <style type="text/css">
      #c1 {
        background-image: url(https://zos.alipayobjects.com/rmsportal/kqiqfRADgLgCCNJRHhDv.png);
        background-repeat: no-repeat;
        width: 650px;
        height: 450px;
        background-size: 100%;
        margin: 0 auto;
      }
    </style>
</div>

</body>
    </html>