公司的项目中用到了google地图API, 使用Google API开发就会用到Marker, 用来在google 地图上标注位置git
可是google marker使用过程当中也有个问题,就是若是在google 地图上标注了大量的Marker, 一个是容易致使google地图加载速度变慢,另外一个是marker太多,地图就很github
很差看,甚至是看不清楚了,由于你会发现地图就被这些Marker占据了svn
在Google Maps API中,提供了集群来解决这个问题,也就是MarkerClusterer,this
咱们以前用的library(Google 提供) : https://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/src/markerclusterer.jsgoogle
而后在Google maps上的图片标记url是: https://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/images/murl
通常在JS中用法以下:code
var mc = new MarkerClusterer(map, markers, {cdn
imagePath: 'https://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/images/m'
});
图片
然而,在12/05/2016, Google decommissioned the google-maps-utility-library-v3.googlecode.com source for this library. 也就是说,今年的5月12日,google中止了这个library的使用,google把它移到了GitHub上。开发
GitHub地址: https://cdn.rawgit.com/googlemaps/js-marker-clusterer/gh-pages/src/markerclusterer.js
https://github.com/googlemaps/js-marker-clusterer
https://github.com/googlemaps/js-marker-clusterer/blob/gh-pages/src/markerclusterer.js
图片地址是 https://github.com/googlemaps/js-marker-clusterer/tree/gh-pages/images
在你的开发环境中如何使用它呢? 使用步骤以下:
1. Find your link on GitHub, and click to the "Raw" version of the file.
2. Copy the URL, and link to it
3. Change raw.githubusercontent.com to rawgit.com (non-production) or cdn.rawgit.com(production)
因此,在markerclusterer.js中,把图片地址由 https://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/images
改成 https://cdn.rawgit.com/googlemaps/js-marker-clusterer/gh-pages/images