echarts-迁徙图地点图标颜色修改

引用：https://gallery.echartsjs.com/editor.html?c=xLSy9AUmlA

var uploadedDataURL = "/asset/get/s/data-1566476001452-vcHUP4aCj.json";

var chinaGeoCoordMap = {
'黑龙江': [127.9688, 45.368],
'内蒙古': [110.3467, 41.4899],
"吉林": [125.8154, 44.2584],
'北京市': [116.4551, 40.2539],
"辽宁": [123.1238, 42.1216],
"河北": [114.4995, 38.1006],
"天津": [117.4219, 39.4189],
"山西": [112.3352, 37.9413],
"陕西": [109.1162, 34.2004],
"甘肃": [103.5901, 36.3043],
"宁夏": [106.3586, 38.1775],
"青海": [101.4038, 36.8207],
"新疆": [87.9236, 43.5883],
"西藏": [91.11, 29.97],
"四川": [103.9526, 30.7617],
"重庆": [108.384366, 30.439702],
"山东": [117.1582, 36.8701],
"河南": [113.4668, 34.6234],
"江苏": [118.8062, 31.9208],
"安徽": [117.29, 32.0581],
"湖北": [114.3896, 30.6628],
"浙江": [119.5313, 29.8773],
"福建": [119.4543, 25.9222],
"江西": [116.0046, 28.6633],
"湖南": [113.0823, 28.2568],
"贵州": [106.6992, 26.7682],
"云南": [102.9199, 25.4663],
"广东": [113.12244, 23.009505],
"广西": [108.479, 23.1152],
"海南": [110.3893, 19.8516],
'上海': [121.4648, 31.2891],
'钓鱼岛': [123.47396850585938,25.746714028822527]
};
var chinaDatas = [
[{
name: '黑龙江',
value: 0
}],
[{
name: '内蒙古',
value: 0
}],
[{
name: '吉林',
value: 0
}],
[{
name: '辽宁',
value: 0
}],
[{
name: '河北',
value: 0
}],
[{
name: '天津',
value: 0
}],
[{
name: '山西',
value: 0
}],
[{
name: '陕西',
value: 0
}],
[{
name: '甘肃',
value: 0
}],
[{
name: '宁夏',
value: 0
}],
[{
name: '青海',
value: 0
}],
[{
name: '新疆',
value: 0
}],
[{
name: '西藏',
value: 0
}],
[{
name: '四川',
value: 0
}],
[{
name: '重庆',
value: 0
}],
[{
name: '山东',
value: 0
}],
[{
name: '河南',
value: 0
}],
[{
name: '江苏',
value: 0
}],
[{
name: '安徽',
value: 0
}],
[{
name: '湖北',
value: 0
}],
[{
name: '浙江',
value: 0
}],
[{
name: '福建',
value: 0
}],
[{
name: '江西',
value: 0
}],
[{
name: '湖南',
value: 0
}],
[{
name: '贵州',
value: 0
}],
[{
name: '广西',
value: 0
}],
[{
name: '海南',
value: 0
}],
[{
name: '上海',
value: 1
}], [{
name: '钓鱼岛',
value: 1
}]
];

var convertData = function(data) {
var res = [];
for (var i = 0; i < data.length; i++) {
var dataItem = data[i];
var fromCoord = chinaGeoCoordMap[dataItem[0].name];
var toCoord = [116.4551, 40.2539];
if (fromCoord && toCoord) {
res.push([{
coord: fromCoord,
value: dataItem[0].value
}, {
coord: toCoord,
}]);
}
}
return res;
};
var series = [];

[
['北京市', chinaDatas]
].forEach(function(item, i) {
console.log(item)
series.push({
type: 'lines',
zlevel: 2,
effect: {
show: true,
period: 4, //箭头指向速度，值越小速度越快
trailLength: 0.02, //特效尾迹长度[0,1]值越大，尾迹越长重
symbol: 'arrow', //箭头图标
symbolSize: 5, //图标大小
},
lineStyle: {
normal: {
1, //尾迹线条宽度
opacity: 1, //尾迹线条透明度
curveness: .3 //尾迹线条曲直度
}
},
data: convertData(item[1])
}, {
type: 'effectScatter',
coordinateSystem: 'geo',
zlevel: 2,
rippleEffect: { //涟漪特效
period: 4, //动画时间，值越小速度越快
brushType: 'stroke', //波纹绘制方式 stroke, fill
scale: 4 //波纹圆环最大限制，值越大波纹越大
},
label: {
normal: {
show: true,
position: 'right', //显示位置
offset: [5, 0], //偏移设置
formatter: function(params) { //圆环显示文字
return params.data.name;
},
fontSize: 13
},
emphasis: {
show: true
}
},
symbol: 'circle',
symbolSize: function(val) {
return 5 + val[2] * 5; //圆环大小
},
itemStyle: {
normal: {
show: false,
color: '#f00'
}
},
data: item[1].map(function(dataItem) {
return {
name: dataItem[0].name,
value: chinaGeoCoordMap[dataItem[0].name].concat([dataItem[0].value])
};
}),
},
//被攻击点
{
type: 'scatter',
coordinateSystem: 'geo',
zlevel: 2,
rippleEffect: {
period: 4,
brushType: 'stroke',
scale: 4
},
label: {
normal: {
show: true,
position: 'right',
//offset:[5, 0],
color: '#0f0',
formatter: '{b}',
textStyle: {
color: "#0f0"
}
},
emphasis: {
show: true,
color: "#f60"
}
},
symbol: 'pin',
symbolSize: 50,
data: [{
name: item[0],
value: chinaGeoCoordMap[item[0]].concat([10]),
}],
}
);
});

$.get(uploadedDataURL, function(json) {
echarts.registerMap('china', json);
option = {
tooltip: {
trigger: 'item',
backgroundColor: 'rgba(166, 200, 76, 0.82)',
borderColor: '#FFFFCC',
showDelay: 0,
hideDelay: 0,
enterable: true,
transitionDuration: 0,
extraCssText: 'z-index:100',
formatter: function(params, ticket, callback) {
//根据业务自己拓展要显示的内容
var res = "";
var name = params.name;
var value = params.value[params.seriesIndex + 1];
res = "<span style='color:#fff;'>" + name + "</span><br/>数据：" + value;
return res;
}
},
backgroundColor: "#013954",
visualMap: { //图例值控制
min: 0,
max: 1,
calculable: true,
show: true,
color: ['#f44336', '#fc9700', '#ffde00', '#ffde00', '#00eaff'],
textStyle: {
color: '#fff'
}
},
geo: {
map: 'china',
zoom: 1.2,
label: {
emphasis: {
show: false
}
},
roam: true, //是否允许缩放
itemStyle: {
normal: {
color: 'rgba(51, 69, 89, .5)', //地图背景色
borderColor: '#516a89', //省市边界线00fcff 516a89
borderWidth: 1
},
emphasis: {
color: 'rgba(37, 43, 61, .5)' //悬浮背景
}
}
},
series: series
};

myChart.setOption(option)
})

在修改颜色的过程中，开始一直在series里加itemStyle>normal下加颜色，但一直不行；后来多次查资料，了解改图颜色控制是以visualMap来控制的，

visualMap里的min，max控制区间，color里颜色对应区间颜色

引用：https://blog.csdn.net/luanpeng825485697/article/details/76739353