当前位置： 移动技术网 > IT编程>开发语言>JavaScript > ArcGIS API for Javascript3.23加载谷歌地图教程

ArcGIS API for Javascript3.23加载谷歌地图教程

2019年04月16日  | 移动技术网IT编程  | 我要评论

本篇主要介绍利用arcgis api for javascript最新版本3.23加载谷歌地图和谷歌影像，以加载谷歌地图为例，方法即通过tiledmapservicelayer来自定义谷歌地图图层模块。

1、谷歌地图加载效果

【谷歌地图】

这里写图片描述

【谷歌影像】

这里写图片描述

2、定义类——谷歌图层googlemaplayer

define(["dojo/_base/declare", "esri/layers/tiledmapservicelayer", "esri/geometry/extent", "esri/spatialreference", "esri/layers/tileinfo"],
    function (declare, tiledmapservicelayer, extent, spatialreference, tileinfo) {
        return declare(tiledmapservicelayer, {
            // 构造函数
            constructor: function (properties) {
                // 这里使用坐标系为投影坐标系wgs_1984_web_mercator（wkid: 102113）
                this.spatialreference = new spatialreference({
                    wkid:102113
                });
                // 图层提供的起始显示范围以及整个图层的地理范围
                this.fullextent = new extent(-20037508.342787, -20037508.342787, 20037508.342787, 20037508.342787, this.spatialreference);
                this.initialextent = new extent(5916776.8, 1877209.3, 19242502.6, 7620381.8, this.spatialreference);
                // 图层提供的切片信息
                this.tileinfo = new tileinfo({
                    "rows": 256,
                    "cols": 256,
                    "compressionquality": 0,
                    "origin": {
                        "x": -20037508.342787,
                        "y": 20037508.342787
                    },
                    "spatialreference": {
                        "wkid": 102113
                    },
                    "lods": [
                        { "level": 0, "resolution": 156543.033928, "scale": 591657527.591555 },
                        { "level": 1, "resolution": 78271.5169639999, "scale": 295828763.795777 },
                        { "level": 2, "resolution": 39135.7584820001, "scale": 147914381.897889 },
                        { "level": 3, "resolution": 19567.8792409999, "scale": 73957190.948944 },
                        { "level": 4, "resolution": 9783.93962049996, "scale": 36978595.474472 },
                        { "level": 5, "resolution": 4891.96981024998, "scale": 18489297.737236 },
                        { "level": 6, "resolution": 2445.98490512499, "scale": 9244648.868618 },
                        { "level": 7, "resolution": 1222.99245256249, "scale": 4622324.434309 },
                        { "level": 8, "resolution": 611.49622628138, "scale": 2311162.217155 },
                        { "level": 9, "resolution": 305.748113140558, "scale": 1155581.108577 },
                        { "level": 10, "resolution": 152.874056570411, "scale": 577790.554289 },
                        { "level": 11, "resolution": 76.4370282850732, "scale": 288895.277144 },
                        { "level": 12, "resolution": 38.2185141425366, "scale": 144447.638572 },
                        { "level": 13, "resolution": 19.1092570712683, "scale": 72223.819286 },
                        { "level": 14, "resolution": 9.55462853563415, "scale": 36111.909643 },
                        { "level": 15, "resolution": 4.77731426794937, "scale": 18055.954822 },
                        { "level": 16, "resolution": 2.38865713397468, "scale": 9027.977411 },
                        { "level": 17, "resolution": 1.19432856685505, "scale": 4513.988705 },
                        { "level": 18, "resolution": 0.597164283559817, "scale": 2256.994353 },
                        { "level": 19, "resolution": 0.298582141647617, "scale": 1128.497176 }
                    ]
                });

                // 设置图层的loaded属性，并触发onload事件
                this.loaded = true;
                this.onload(this);
            },
            gettileurl: function (level, row, col) {
                var zoom = level - 1;
                var offsetx = math.pow(2, zoom);
                var offsety = offsetx - 1;
                var numx = col - offsetx;
                var numy = (-row) + offsety;
                zoom = level + 1;
                var num = (col + row) % 8 + 1;
                var url = "https://mt" + (col % 4) + ".google.cn/vt/lyrs=m@226000000&hl=zh-cn&gl=cn&x=" + col + "&y=" + row + "&z=" + level + "&s=gali";
                return url;
            }
        });
    }
)

3、加载谷歌图层并显示

<script>
    var map;
    require([
        "esri/map",
        "src/googlemaplayer",
        "dojo/parser",
        "dojo/domready!"], 
    function(map,googlemaplayer,parser) {
        parser.parse();
        map = new map("map", {
             logo: false,
             center: [107.9, 34.7],
             zoom: 4
        });
        var googlelayer = new googlemaplayer();
        map.addlayer(googlelayer);
    });
</script>

4、下载

下载地址：arcgis api for javascript3.23加载谷歌地图

源码包括谷歌地图、影像图（加标注）自定义文件(src/*.js)和图层加载显示文件（.html），arcgis api for javascript使用的是当前最新版本【3.23】。

这里写图片描述

这里写图片描述

您可能感兴趣的文章:

如对本文有疑问， 点击进行留言回复！！

相关文章:

验证码：
最近更新的文章
大家感兴趣的文章
移动技术网