a)) / (1.0 - Math.sin(a)));
      document.getElementById('mouse-position').innerHTML = "X轴：" + x.toFixed(2) + "，Y轴：" + y.toFixed(2);
    });
    $.get('../../static/data/mapv/car.csv', function (csvstr) {
      var options = {
        context: '2d',
        strokeStyle: 'rgba(50, 50, 255, 0.8)',
        lineWidth: 0.05,
        globalCompositeOperation: 'lighter',
        draw: 'simple'
      };
      var dataSet = mapv.csv.getDataSet(csvstr);
      new mapboxgl.zondy.MapvLayer(map, dataSet, opti