地图拖动时覆盖物不随动

描述:当前是关于Echarts图表中的 散点图 示例。
 
            
var data = [
	{name: '海门', value: 9},
	{name: '鄂尔多斯', value: 12},
	{name: '招远', value: 12},
	{name: '舟山', value: 12},
	{name: '齐齐哈尔', value: 14},
	{name: '盐城', value: 15},
	{name: '赤峰', value: 16},
	{name: '青岛', value: 18},
	{name: '乳山', value: 18},
	{name: '金昌', value: 19},
	{name: '泉州', value: 21},
	{name: '莱西', value: 21},
	{name: '日照', value: 21},
	{name: '胶南', value: 22},
	{name: '南通', value: 23},
	{name: '拉萨', value: 24},
	{name: '云浮', value: 24},
	{name: '梅州', value: 25},
	{name: '文登', value: 25},
	{name: '上海', value: 25},
	{name: '攀枝花', value: 25},
	{name: '威海', value: 25},
	{name: '承德', value: 25},
	{name: '厦门', value: 26},
	{name: '汕尾', value: 26},
	{name: '潮州', value: 26},
	{name: '丹东', value: 27},
	{name: '太仓', value: 27},
	{name: '曲靖', value: 27},
	{name: '烟台', value: 28},
	{name: '福州', value: 29},
	{name: '瓦房店', value: 30},
	{name: '即墨', value: 30},
	{name: '抚顺', value: 31},
	{name: '玉溪', value: 31},
	{name: '张家口', value: 31},
	{name: '阳泉', value: 31},
	{name: '莱州', value: 32},
	{name: '湖州', value: 32},
	{name: '汕头', value: 32},
	{name: '昆山', value: 33},
	{name: '宁波', value: 33},
	{name: '湛江', value: 33},
	{name: '揭阳', value: 34},
	{name: '荣成', value: 34},
	{name: '连云港', value: 35},
	{name: '葫芦岛', value: 35},
	{name: '常熟', value: 36},
	{name: '东莞', value: 36},
	{name: '河源', value: 36},
	{name: '淮安', value: 36},
	{name: '泰州', value: 36},
	{name: '南宁', value: 37},
	{name: '营口', value: 37},
	{name: '惠州', value: 37},
	{name: '江阴', value: 37},
	{name: '蓬莱', value: 37},
	{name: '韶关', value: 38},
	{name: '嘉峪关', value: 38},
	{name: '广州', value: 38},
	{name: '延安', value: 38},
	{name: '太原', value: 39},
	{name: '清远', value: 39},
	{name: '中山', value: 39},
	{name: '昆明', value: 39},
	{name: '寿光', value: 40},
	{name: '盘锦', value: 40},
	{name: '长治', value: 41},
	{name: '深圳', value: 41},
	{name: '珠海', value: 42},
	{name: '宿迁', value: 43},
	{name: '咸阳', value: 43},
	{name: '铜川', value: 44},
	{name: '平度', value: 44},
	{name: '佛山', value: 44},
	{name: '海口', value: 44},
	{name: '江门', value: 45},
	{name: '章丘', value: 45},
	{name: '肇庆', value: 46},
	{name: '大连', value: 47},
	{name: '临汾', value: 47},
	{name: '吴江', value: 47},
	{name: '石嘴山', value: 49},
	{name: '沈阳', value: 50},
	{name: '苏州', value: 50},
	{name: '茂名', value: 50},
	{name: '嘉兴', value: 51},
	{name: '长春', value: 51},
	{name: '胶州', value: 52},
	{name: '银川', value: 52},
	{name: '张家港', value: 52},
	{name: '三门峡', value: 53},
	{name: '锦州', value: 54},
	{name: '南昌', value: 54},
	{name: '柳州', value: 54},
	{name: '三亚', value: 54},
	{name: '自贡', value: 56},
	{name: '吉林', value: 56},
	{name: '阳江', value: 57},
	{name: '泸州', value: 57},
	{name: '西宁', value: 57},
	{name: '宜宾', value: 58},
	{name: '呼和浩特', value: 58},
	{name: '成都', value: 58},
	{name: '大同', value: 58},
	{name: '镇江', value: 59},
	{name: '桂林', value: 59},
	{name: '张家界', value: 59},
	{name: '宜兴', value: 59},
	{name: '北海', value: 60},
	{name: '西安', value: 61},
	{name: '金坛', value: 62},
	{name: '东营', value: 62},
	{name: '牡丹江', value: 63},
	{name: '遵义', value: 63},
	{name: '绍兴', value: 63},
	{name: '扬州', value: 64},
	{name: '常州', value: 64},
	{name: '潍坊', value: 65},
	{name: '重庆', value: 66},
	{name: '台州', value: 67},
	{name: '南京', value: 67},
	{name: '滨州', value: 70},
	{name: '贵阳', value: 71},
	{name: '无锡', value: 71},
	{name: '本溪', value: 71},
	{name: '克拉玛依', value: 72},
	{name: '渭南', value: 72},
	{name: '马鞍山', value: 72},
	{name: '宝鸡', value: 72},
	{name: '焦作', value: 75},
	{name: '句容', value: 75},
	{name: '北京', value: 79},
	{name: '徐州', value: 79},
	{name: '衡水', value: 80},
	{name: '包头', value: 80},
	{name: '绵阳', value: 80},
	{name: '乌鲁木齐', value: 84},
	{name: '枣庄', value: 84},
	{name: '杭州', value: 84},
	{name: '淄博', value: 85},
	{name: '鞍山', value: 86},
	{name: '溧阳', value: 86},
	{name: '库尔勒', value: 86},
	{name: '安阳', value: 90},
	{name: '开封', value: 90},
	{name: '济南', value: 92},
	{name: '德阳', value: 93},
	{name: '温州', value: 95},
	{name: '九江', value: 96},
	{name: '邯郸', value: 98},
	{name: '临安', value: 99},
	{name: '兰州', value: 99},
	{name: '沧州', value: 100},
	{name: '临沂', value: 103},
	{name: '南充', value: 104},
	{name: '天津', value: 105},
	{name: '富阳', value: 106},
	{name: '泰安', value: 112},
	{name: '诸暨', value: 112},
	{name: '郑州', value: 113},
	{name: '哈尔滨', value: 114},
	{name: '聊城', value: 116},
	{name: '芜湖', value: 117},
	{name: '唐山', value: 119},
	{name: '平顶山', value: 119},
	{name: '邢台', value: 119},
	{name: '德州', value: 120},
	{name: '济宁', value: 120},
	{name: '荆州', value: 127},
	{name: '宜昌', value: 130},
	{name: '义乌', value: 132},
	{name: '丽水', value: 133},
	{name: '洛阳', value: 134},
	{name: '秦皇岛', value: 136},
	{name: '株洲', value: 143},
	{name: '石家庄', value: 147},
	{name: '莱芜', value: 148},
	{name: '常德', value: 152},
	{name: '保定', value: 153},
	{name: '湘潭', value: 154},
	{name: '金华', value: 157},
	{name: '岳阳', value: 169},
	{name: '长沙', value: 175},
	{name: '衢州', value: 177},
	{name: '廊坊', value: 193},
	{name: '菏泽', value: 194},
	{name: '合肥', value: 229},
	{name: '武汉', value: 273},
	{name: '大庆', value: 279}
];
var geoCoordMap = {
	'海门':[121.15,31.89],
	'鄂尔多斯':[109.781327,39.608266],
	'招远':[120.38,37.35],
	'舟山':[122.207216,29.985295],
	'齐齐哈尔':[123.97,47.33],
	'盐城':[120.13,33.38],
	'赤峰':[118.87,42.28],
	'青岛':[120.33,36.07],
	'乳山':[121.52,36.89],
	'金昌':[102.188043,38.520089],
	'泉州':[118.58,24.93],
	'莱西':[120.53,36.86],
	'日照':[119.46,35.42],
	'胶南':[119.97,35.88],
	'南通':[121.05,32.08],
	'拉萨':[91.11,29.97],
	'云浮':[112.02,22.93],
	'梅州':[116.1,24.55],
	'文登':[122.05,37.2],
	'上海':[121.48,31.22],
	'攀枝花':[101.718637,26.582347],
	'威海':[122.1,37.5],
	'承德':[117.93,40.97],
	'厦门':[118.1,24.46],
	'汕尾':[115.375279,22.786211],
	'潮州':[116.63,23.68],
	'丹东':[124.37,40.13],
	'太仓':[121.1,31.45],
	'曲靖':[103.79,25.51],
	'烟台':[121.39,37.52],
	'福州':[119.3,26.08],
	'瓦房店':[121.979603,39.627114],
	'即墨':[120.45,36.38],
	'抚顺':[123.97,41.97],
	'玉溪':[102.52,24.35],
	'张家口':[114.87,40.82],
	'阳泉':[113.57,37.85],
	'莱州':[119.942327,37.177017],
	'湖州':[120.1,30.86],
	'汕头':[116.69,23.39],
	'昆山':[120.95,31.39],
	'宁波':[121.56,29.86],
	'湛江':[110.359377,21.270708],
	'揭阳':[116.35,23.55],
	'荣成':[122.41,37.16],
	'连云港':[119.16,34.59],
	'葫芦岛':[120.836932,40.711052],
	'常熟':[120.74,31.64],
	'东莞':[113.75,23.04],
	'河源':[114.68,23.73],
	'淮安':[119.15,33.5],
	'泰州':[119.9,32.49],
	'南宁':[108.33,22.84],
	'营口':[122.18,40.65],
	'惠州':[114.4,23.09],
	'江阴':[120.26,31.91],
	'蓬莱':[120.75,37.8],
	'韶关':[113.62,24.84],
	'嘉峪关':[98.289152,39.77313],
	'广州':[113.23,23.16],
	'延安':[109.47,36.6],
	'太原':[112.53,37.87],
	'清远':[113.01,23.7],
	'中山':[113.38,22.52],
	'昆明':[102.73,25.04],
	'寿光':[118.73,36.86],
	'盘锦':[122.070714,41.119997],
	'长治':[113.08,36.18],
	'深圳':[114.07,22.62],
	'珠海':[113.52,22.3],
	'宿迁':[118.3,33.96],
	'咸阳':[108.72,34.36],
	'铜川':[109.11,35.09],
	'平度':[119.97,36.77],
	'佛山':[113.11,23.05],
	'海口':[110.35,20.02],
	'江门':[113.06,22.61],
	'章丘':[117.53,36.72],
	'肇庆':[112.44,23.05],
	'大连':[121.62,38.92],
	'临汾':[111.5,36.08],
	'吴江':[120.63,31.16],
	'石嘴山':[106.39,39.04],
	'沈阳':[123.38,41.8],
	'苏州':[120.62,31.32],
	'茂名':[110.88,21.68],
	'嘉兴':[120.76,30.77],
	'长春':[125.35,43.88],
	'胶州':[120.03336,36.264622],
	'银川':[106.27,38.47],
	'张家港':[120.555821,31.875428],
	'三门峡':[111.19,34.76],
	'锦州':[121.15,41.13],
	'南昌':[115.89,28.68],
	'柳州':[109.4,24.33],
	'三亚':[109.511909,18.252847],
	'自贡':[104.778442,29.33903],
	'吉林':[126.57,43.87],
	'阳江':[111.95,21.85],
	'泸州':[105.39,28.91],
	'西宁':[101.74,36.56],
	'宜宾':[104.56,29.77],
	'呼和浩特':[111.65,40.82],
	'成都':[104.06,30.67],
	'大同':[113.3,40.12],
	'镇江':[119.44,32.2],
	'桂林':[110.28,25.29],
	'张家界':[110.479191,29.117096],
	'宜兴':[119.82,31.36],
	'北海':[109.12,21.49],
	'西安':[108.95,34.27],
	'金坛':[119.56,31.74],
	'东营':[118.49,37.46],
	'牡丹江':[129.58,44.6],
	'遵义':[106.9,27.7],
	'绍兴':[120.58,30.01],
	'扬州':[119.42,32.39],
	'常州':[119.95,31.79],
	'潍坊':[119.1,36.62],
	'重庆':[106.54,29.59],
	'台州':[121.420757,28.656386],
	'南京':[118.78,32.04],
	'滨州':[118.03,37.36],
	'贵阳':[106.71,26.57],
	'无锡':[120.29,31.59],
	'本溪':[123.73,41.3],
	'克拉玛依':[84.77,45.59],
	'渭南':[109.5,34.52],
	'马鞍山':[118.48,31.56],
	'宝鸡':[107.15,34.38],
	'焦作':[113.21,35.24],
	'句容':[119.16,31.95],
	'北京':[116.46,39.92],
	'徐州':[117.2,34.26],
	'衡水':[115.72,37.72],
	'包头':[110,40.58],
	'绵阳':[104.73,31.48],
	'乌鲁木齐':[87.68,43.77],
	'枣庄':[117.57,34.86],
	'杭州':[120.19,30.26],
	'淄博':[118.05,36.78],
	'鞍山':[122.85,41.12],
	'溧阳':[119.48,31.43],
	'库尔勒':[86.06,41.68],
	'安阳':[114.35,36.1],
	'开封':[114.35,34.79],
	'济南':[117,36.65],
	'德阳':[104.37,31.13],
	'温州':[120.65,28.01],
	'九江':[115.97,29.71],
	'邯郸':[114.47,36.6],
	'临安':[119.72,30.23],
	'兰州':[103.73,36.03],
	'沧州':[116.83,38.33],
	'临沂':[118.35,35.05],
	'南充':[106.110698,30.837793],
	'天津':[117.2,39.13],
	'富阳':[119.95,30.07],
	'泰安':[117.13,36.18],
	'诸暨':[120.23,29.71],
	'郑州':[113.65,34.76],
	'哈尔滨':[126.63,45.75],
	'聊城':[115.97,36.45],
	'芜湖':[118.38,31.33],
	'唐山':[118.02,39.63],
	'平顶山':[113.29,33.75],
	'邢台':[114.48,37.05],
	'德州':[116.29,37.45],
	'济宁':[116.59,35.38],
	'荆州':[112.239741,30.335165],
	'宜昌':[111.3,30.7],
	'义乌':[120.06,29.32],
	'丽水':[119.92,28.45],
	'洛阳':[112.44,34.7],
	'秦皇岛':[119.57,39.95],
	'株洲':[113.16,27.83],
	'石家庄':[114.48,38.03],
	'莱芜':[117.67,36.19],
	'常德':[111.69,29.05],
	'保定':[115.48,38.85],
	'湘潭':[112.91,27.87],
	'金华':[119.64,29.12],
	'岳阳':[113.09,29.37],
	'长沙':[113,28.21],
	'衢州':[118.88,28.97],
	'廊坊':[116.7,39.53],
	'菏泽':[115.480656,35.23375],
	'合肥':[117.27,31.86],
	'武汉':[114.31,30.52],
	'大庆':[125.03,46.58]
};
var convertData = function (data) {
	var res = [];
	for (var i = 0; i < data.length; i++) {
		var geoCoord = geoCoordMap[data[i].name];
		if (geoCoord) {
			res.push({
				name: data[i].name,
				value: geoCoord.concat(data[i].value)
			});
		}
	}
	return res;
};
option = {
	title: {
		text: '全国主要城市空气质量 - 百度地图',
		subtext: 'data from PM25.in',
		sublink: 'http://www.pm25.in',
		left: 'center'
	},
	tooltip : {
		trigger: 'item'
	},
	bmap: {
		center: [104.114129, 37.550339],
		zoom: 5,
		roam: true,
		mapStyle: {
			styleJson: [{
				'featureType': 'water',
				'elementType': 'all',
				'stylers': {
					'color': '#d1d1d1'
				}
			}, {
				'featureType': 'land',
				'elementType': 'all',
				'stylers': {
					'color': '#f3f3f3'
				}
			}, {
				'featureType': 'railway',
				'elementType': 'all',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'highway',
				'elementType': 'all',
				'stylers': {
					'color': '#fdfdfd'
				}
			}, {
				'featureType': 'highway',
				'elementType': 'labels',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'arterial',
				'elementType': 'geometry',
				'stylers': {
					'color': '#fefefe'
				}
			}, {
				'featureType': 'arterial',
				'elementType': 'geometry.fill',
				'stylers': {
					'color': '#fefefe'
				}
			}, {
				'featureType': 'poi',
				'elementType': 'all',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'green',
				'elementType': 'all',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'subway',
				'elementType': 'all',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'manmade',
				'elementType': 'all',
				'stylers': {
					'color': '#d1d1d1'
				}
			}, {
				'featureType': 'local',
				'elementType': 'all',
				'stylers': {
					'color': '#d1d1d1'
				}
			}, {
				'featureType': 'arterial',
				'elementType': 'labels',
				'stylers': {
					'visibility': 'off'
				}
			}, {
				'featureType': 'boundary',
				'elementType': 'all',
				'stylers': {
					'color': '#fefefe'
				}
			}, {
				'featureType': 'building',
				'elementType': 'all',
				'stylers': {
					'color': '#d1d1d1'
				}
			}, {
				'featureType': 'label',
				'elementType': 'labels.text.fill',
				'stylers': {
					'color': '#999999'
				}
			}]
		}
	},
	series : [
		{
			name: 'pm2.5',
			type: 'scatter',
			coordinateSystem: 'bmap',
			data: convertData(data),
			symbolSize: function (val) {
				return val[2] / 10;
			},
			label: {
				normal: {
					formatter: '{b}',
					position: 'right',
					show: false
				},
				emphasis: {
					show: true
				}
			},
			itemStyle: {
				normal: {
					color: 'purple'
				}
			}
		},
		{
			name: 'Top 5',
			type: 'effectScatter',
			coordinateSystem: 'bmap',
			data: convertData(data.sort(function (a, b) {
				return b.value - a.value;
			}).slice(0, 6)),
			symbolSize: function (val) {
				return val[2] / 10;
			},
			showEffectOn: 'render',
			rippleEffect: {
				brushType: 'stroke'
			},
			hoverAnimation: true,
			label: {
				normal: {
					formatter: '{b}',
					position: 'right',
					show: true
				}
			},
			itemStyle: {
				normal: {
					color: 'purple',
					shadowBlur: 10,
					shadowColor: '#333'
				}
			},
			zlevel: 1
		}
	]
};