Layers

Google Map 最近的一个很有用的增强大概就是图层的重叠概念了，目前提供两个现成的图层，Panoramio and Wikipedia.

Posted by Pamela Fox, Maps API Team

Back in May, we released a feature in Google Maps that let users toggle on additional "layers" of information on top of the map, starting with Panoramio and Wikipedia options. Both of these layers display thousands of variably sized icons on top of the map, and open info windows with more information about the clicked icon. So the user might click a large "W" in New York to read a snippet from Wikipedia's article about the Empire State Building, or they might click on a thumbnail in Black Rock City to see a photo of a Burning Man Temple.

这是一个很重要的概念，因为地图上要显示的信息太多，可以通过不同的图层来显示不同种类的自定义附加信息。

整合效果如下, 动态demo在www.mapbean.com展示