leafletjs怎么设置地图

首先引入leaflet相关js和css

<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />

<script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>

然后构建地图，并添加openStreetMap

// create a map in the "map" div, set the view to a given place and zoom

var map = L.map('map').setView([51.505, -0.09], 13)

// add an OpenStreetMap tile layer

L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(map)

// add a marker in the given location, attach some popup content to it and open the popup

L.marker([51.5, -0.09]).addTo(map)

.bindPopup('A pretty CSS3 popup.

Easily customizable.')

.openPopup()

运行效果如下：

结合Qunee拓扑图

Leaflet地图上可以添加点线面基本图形，如果需要展示更复杂的图形或者链接关系，显得力不足，可以结合Qunee组件使用，下面我们让地图和拓扑图叠加起来，在地图上显示拓扑元素，并整合两者的交互

图层叠加

在地图的DIV容器中添加一个孩子div，作为拓扑图的画布，并设置相应的css，然后调用超类的构造函数，取消默认的双击和滚轮 *** 作，已被后面地图与拓扑图的交互同步var MapGraph = function (map) {

var container = map._container

var canvas = document.createElement("div")

canvas.style.width = "100%"

canvas.style.height = "100%"

container.appendChild(canvas)

Q.doSuperConstructor(this, MapGraph, [canvas])

this.enableWheelZoom = false

this.enableDoubleClickToOverview = false

this.originAtCenter = false

this.setMap(map)

...

}

关联地图

下面实现拓扑图与地图的绑定，在#setMap(map)函数中，监听了地图的zoomstart和zoomend事件，根据经纬度动态的调整图元的屏幕位置，同样在节点被拖动后，也需要设置新的经纬度MapGraph.prototype = {

map: null,

mapShowing: true,

enableInertia: false,

createNodeByLonLat: function (name, lon, lat) {

var l = this.toLonLat(lon, lat)

var p = this.getPixelFromLonLat(l)

var node = graph.createNode(name, p.x, p.y)

node.lonLat = l

return node

},

toLonLat: function (lon, lat) {

return new L.latLng(lat, lon)

},

getPixelFromLonLat: function (lonLat) {

return this.map.latLngToContainerPoint(lonLat, this.map._zoom)

},

getLonLatFromPixel: function (x, y) {

return this.map.containerPointToLatLng([x, y])

},

setMap: function (map) {

this.map = map

this.map.on("zoomstart", this.hideGraph, this)

this.map.on("zoomend", this.updateNodes, this)

this.html.ondblclick = createEventFunction(this, function (evt) {

if (this.getElementByMouseEvent(evt)) {

Q.stopEvent(evt)

}

})

this.interactionDispatcher.addListener(function (evt) {

if (evt.kind == Q.InteractionEvent.ELEMENT_MOVE_END) {

var datas = evt.datas

Q.forEach(datas, function (data) {

var pixel = this.toCanvas(data.location.x, data.location.y)

data.lonLat = this.getLonLatFromPixel(pixel.x, pixel.y)

}, this)

}

}, this)

},

hideGraph: function(){

this.html.style.visibility = "hidden"

},

showGraph: function(){

this.html.style.visibility = ""

},

translate: function (tx, ty) {

Q.doSuper(this, MapGraph, "translate", arguments)

this.map.panBy([-tx, -ty], {animate: false})

},

resetVisibility: function () {

this.forEach(function (e) {

if (e.invalidateVisibility) {

e.invalidateVisibility(true)

}

})

},

updateNodes: function () {

this.translateTo(0, 0, 1, true)

this.resetVisibility()

this.forEach(function (d) {

if (d instanceof Q.Node) {

var l = d.lonLat

var p = this.getPixelFromLonLat(l)

d.location = p

}

}, this)

this.showGraph()

}

}

Q.extend(MapGraph, Q.Graph)

此外还可以通过可见过滤器实现，不同比例尺显示不同的节点

https://leafletjs.com/

先贴上leaflet的官网，官网偶尔会抽风打不开。

二维gis开发的api基本大同小异，像百度地图、高德地图、腾讯地图等开发起来比较相似。

推荐先引入 chinaProvider ,免去缓慢加载的烦恼。

1.地图控件

2.地图上添加站点

3.路线展示与控制显隐（计划施工路段/实际施工路段）

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