问将Excel文件中的地址信息可视化为交通热力图，下面代码是什么意思？

var map = new AMap.Map('container',{

resizeEnable: true,

zoom: 13

});

map.setCity('北京市');

var geocode

AMap.plugin(['AMap.ToolBar', 'AMap.Geocoder'],function(){

geocoder = new AMap.Geocoder({

city: "010"//城市，默认：“全国”

});

map.addControl(new AMap.ToolBar());

map.addControl(geocoder);

});

function getMarker (map, model, markers) {

var address = model.address;

geocoder.getLocation(address, function(status,result){

queryNum++

var marke

if(status=='complete'&&result.geocodes.length){

marker = new AMap.Marker({

map: map,

position: result.geocodes[0].location

});

marker.model = model

marker.setLabel({//label默认蓝框白底左上角显示，样式className为：amap-marker-label

offset: new AMap.Pixel(20, 20),//修改label相对于maker的位置

content: model.name

});

markers.push(marker);

position.push({

lng: result.geocodes[0].location.lng,

lat: result.geocodes[0].location.lat,

count: position.length + 1,

...model

})

}else{

console.log('获取位置失败', address);

}

return marke

})

}

var markers = []

var position = []

var locationCount = 0

var queryNum = 0

function modelsToMap (map, models) {

markers = []

locationCount= models ? models.length : 0

queryNum = 0

var model

for (model of models) {

getMarker(map, model, markers)

}

}

function load () {

// address 从 address.js中获取

// address 数据格式

// var address = [{'name': '天安门','address':'xxx号'},{'name': '水立方','address':'yyy号'}]

modelsToMap(map, address)

}

function downloadPostions() {

if (queryNum == locationCount) {

// 调用download.js中的方法

download('position' + position.length, '// amsp.js生成\n' + 'var postions = ' +JSON.stringify(position))

}else{

alert('还没处理完.请稍后.....')

}