[leaflet] esri-leaflet(一):初识leaflet
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- esri-leaflet
- idea引进leaflet代码提示
- HelloWorld
- 使用本地脚本
- 下载脚本
- 加载脚本
- 使用cdn服务
- 编写body
- 创建地图
- 完整代码与结果
- 使用本地脚本
- 天地图作为底图
esri-leaflet
esri为WebGiS开发提供dojo与leaflet两种API
官网 : http://www.esri.com/
github:http://esri.github.io/
leaflet是轻量级的地图JS开源框架
相比dojo,leaflet更轻,也更好与jQuery框架一起使用
官网: http://leafletjs.com/
esri-leaflet是esri针对leaflet给出的WebGIS接口
官网: http://esri.github.io/esri-leaflet/
github: https://github.com/Esri/esri-leaflet
idea引进leaflet代码提示
- 下载leaflet框架JS文件:leaflet.js
- 打开idea设置
File–>Setting–>Languages&Frameworks–>JavaScript–>Libraries
- 添加JS文件
- 应用
- 结果
HelloWorld
使用本地脚本
下载脚本
esri-leaflet: https://github.com/Esri/esri-leaflet/releases/tag/v1.0.0
leaflet原生脚本: https://github.com/Esri/esri-leaflet/releases/tag/v1.0.0
加载脚本
<meta name="viewport" content="width=device-width, initial-scale=1.0"><!-- 加载leaflet--><link rel="stylesheet" href="leaflet/leaflet.css" /><script src="leaflet/leaflet.js"></script><script src="esri/esri-leaflet.js"></script>
使用cdn服务
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /><!-- Load Leaflet from CDN--><link rel="stylesheet" href="https://unpkg.com/leaflet@1.1.0/dist/leaflet.css" integrity="sha512-wcw6ts8Anuw10Mzh9Ytw4pylW8+NAD4ch3lqm9lzAsTxg0GFeJgoAtxuCLREZSC5lUXdVyo/7yfsqFjQ4S+aKw==" crossorigin=""/><script src="https://unpkg.com/leaflet@1.1.0/dist/leaflet.js" integrity="sha512-mNqn2Wg7tSToJhvHcqfzLMU6J4mkOImSPTxVZAdo+lcPlk+GhZmYgACEe0x35K7YzW1zJ7XyJV/TT1MrdXvMcA==" crossorigin=""></script><!-- Load Esri Leaflet from CDN --><script src="https://unpkg.com/esri-leaflet@2.1.0/dist/esri-leaflet.js" integrity="sha512-Tojl3UMd387f6DdAJlo+fKfJZiP55fYT+6Y58yKbHydnueOdSFOxrgLPuUxm7VW1szEt3hZVwv3V2sSUCuT35w==" crossorigin=""></script>
编写body
body里写一个div用来存放地图
<div id="map"></div>
创建地图
<script language="Javascript"> var map = L.map('map').setView([39, -97.5], 4); L.esri.basemapLayer('Streets').addTo(map);</script>
L.:leaflet大部分语法都是 L. 开头
setView():指定初始化位置 与 地图级别
L.esri.basemapLayer(“Topographic”).addTo(map);:使用basemapLayer方法去加载ArcGIS Online上的Topographic地图,并将其加到map上
设置页面加载时适应不通过分辨率的屏幕,其地图区域的高度设置
完整代码与结果
<html><head> <meta charset=utf-8 /> <title>Showing an ArcGIS basemap</title> <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script> <!--通过cdn加载leaflet--> <link rel="stylesheet" href="https://unpkg.com/leaflet@1.1.0/dist/leaflet.css" integrity="sha512-wcw6ts8Anuw10Mzh9Ytw4pylW8+NAD4ch3lqm9lzAsTxg0GFeJgoAtxuCLREZSC5lUXdVyo/7yfsqFjQ4S+aKw==" crossorigin=""/> <script src="https://unpkg.com/leaflet@1.1.0/dist/leaflet.js" integrity="sha512-mNqn2Wg7tSToJhvHcqfzLMU6J4mkOImSPTxVZAdo+lcPlk+GhZmYgACEe0x35K7YzW1zJ7XyJV/TT1MrdXvMcA==" crossorigin=""></script> <!--使用cdn加载esri-leaflet --> <script src="https://unpkg.com/esri-leaflet@2.1.0/dist/esri-leaflet.js" integrity="sha512-Tojl3UMd387f6DdAJlo+fKfJZiP55fYT+6Y58yKbHydnueOdSFOxrgLPuUxm7VW1szEt3hZVwv3V2sSUCuT35w==" crossorigin=""></script> <style> body { margin:0; padding:0; } #map { position: absolute; top:0; bottom:0; right:0; left:0; } </style></head><body> <div id="map"></div><script> var map = L.map('map').setView([39, -97.5], 4); //[纬度,经度] L.esri.basemapLayer('Streets').addTo(map);</script></body></html>
天地图作为底图
天地图优势:国家级测绘数据
<!DOCTYPE html><html> <head> <link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.3/dist/leaflet.css" /> <script src="http://code.jquery.com/jquery-1.11.1.min.js"></script> <script src="https://unpkg.com/leaflet@1.0.3/dist/leaflet.js"></script> </head> <body> <div id="map" style="width: 1000px;height: 700px;"></div> </body> <script> $(function(){ var map = L.map('map', { center: [40, 100], zoom: 4 }); // 影像 L.tileLayer("http://t{s}.tianditu.cn/img_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=img&tileMatrixSet=w&TileMatrix={z}&TileRow={y}&TileCol={x}&style=default&format=tiles", { subdomains: ["0", "1", "2", "3", "4", "5", "6", "7"] }).addTo(map); // 地名标注 L.tileLayer("http://t{s}.tianditu.cn/cia_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=cia&tileMatrixSet=w&TileMatrix={z}&TileRow={y}&TileCol={x}&style=default&format=tiles", { subdomains: ["0", "1", "2", "3", "4", "5", "6", "7"] }).addTo(map); // 边界 L.tileLayer("http://t{s}.tianditu.cn/ibo_w/wmts?service=wmts&request=GetTile&version=1.0.0&LAYER=ibo&tileMatrixSet=w&TileMatrix={z}&TileRow={y}&TileCol={x}&style=default&format=tiles", { subdomains: ["0", "1", "2", "3", "4", "5", "6", "7"] }).addTo(map); }); </script></html>
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