### echart地图散点设置，symbolSize: 1,时会出现散点后逐渐消失，symbolSize: 0.5就正常了
series: [
{
type: 'scatter',
postEffect: {
enable: true
},
progressive: 0,
coordinateSystem: 'geo',
blendMode: 'lighter',
large: true,
silent: true,
dimensions: ['lng', 'lat'],
data: data
symbolSize: 1,
/*symbolSize: function (val,params) {
return val[2] * 1;
},*/
label: {
normal: {
show: false
},
emphasis: {
show: false
}
},
large: true,
useWorker: true,
steps: 2,
itemStyle: {
normal: {
shadowBlur: 10,
color: '#bad8ef',
shadowColor: '#258CF9'
},
emphasis: {
borderColor: '#fff',
borderWidth: 1
}
}
}
] 
### echart地图散点设置，symbolSize: 1,时会出现散点后逐渐消失，symbolSize: 0.5就正常了