Echarts实战案例代码(16)：geomap地图散点图和label轮播的解决方案

场景使用：适用于定时显示区域信息、区域警报提醒。

设置城市中心点

var center = {
    "南京市":[118.767413,32.041544],
    "无锡市":[120.301663,31.574729],
    "徐州市":[117.184811,34.261792],
    "常州市":[119.946973,31.772752],
    "苏州市":[120.619585,31.299379],
    "南通市":[120.864608,32.016212],
    "连云港市":[119.178821,34.600018],
    "淮安市":[119.021265,33.597506],
    "盐城市":[120.139998,33.377631],
    "扬州市":[119.421003,32.393159],
    "镇江市":[119.452753,32.204402],
    "泰州市":[119.915176,32.484882],
    "宿迁市":[118.275162,33.963008]}

注册地图，并渲染map

$.get(uploadedDataURL, function(json) {
    echarts.registerMap('lockdatav', json);
    var option = {
        backgroundColor: '#020933',
        geo: [{
            map: 'lockdatav',
            roam: false, //是否允许缩放
            zoom: 1.1, //默认显示级别
            itemStyle: {
                normal: {
                    areaColor: '#00186E',
                    borderColor: '#195BB9',
                    borderWidth: 1,
                },
                emphasis: {
                    areaColor: '#195BB9'
                }
            },
        }],
        series: [{
                type: 'effectScatter',
                coordinateSystem: 'geo',
                z: 5,
                data: [],
                symbolSize: 14,
                label: {
                    normal: {
                        show: true,
                        formatter: function(params) {
                            return '{fline|地点：'+ params.data.city +'}\n{tline|'+ (params.data.info || '发生xx集件') +'}';
                        },
                        position: 'top',
                        backgroundColor: 'rgba(254,174,33,.8)',
                        padding: [0, 0],
                        borderRadius: 3,
                        lineHeight: 32,
                        color: '#f7fafb',
                        rich: {
                            fline: {
                                padding: [0, 10, 10, 10],
                                color: '#ffffff'
                            },
                            tline: {
                                padding: [10, 10, 0, 10],
                                color: '#ffffff'
                            }
                        }
                    },
                    emphasis: {
                        show: true
                    }
                },
                itemStyle: {
                    color: '#feae21',
                }
            }
        ]
    };
    myChart.setOption(option);
});

设置定时器，推送option.series[0].data

var timer = setInterval(() => {
    var cityIndex = Math.floor(Math.random() * 13);
    var runidx = Math.floor(Math.random() * 3);
    var coordCity = Object.keys(center)[cityIndex];
    var coord = center[coordCity];
    option.series[0].data = [{
        city: coordCity,
        value: coord
    }];
    myChart.setOption(option, true);
},2000);

Done!