myChart.on('click', function (params) {
    var id = params.data\[2\];
});

pathbd.push(
                {
                    coords: cvps,
                    value:data20[i][3],
                    lineStyle: {
                        normal: {
                            opacity: 100,
                            width: truewidth
                        }
                    }
                });

 visualMap: {
                type: 'piecewise',
                left: 'right',
                top: 'up',
                pieces: [{
                    gt: 0,
                    lte: 4,
                    color: 'blue'
                }, {
                    gt: 4,
                    lte: 6,
                    color: 'green'
                }, {
                    gt: 6,
                    lte: 8,
                    color: 'yellow'
                }, {
                    gt: 8,
                    color: 'red'
                }]
            },