OpenLayers 是一个专为Web GIS 客户端开发提供的Javascr ipt 类库包，用于实现标准格式发布的地图数据访问。从OpenLayers2.2版本以后，OpenLayers已经将所用到的Prototype.js组件整合到了自身当中，并不断在Prototype.js的基础上完善面向对象的开发，Rico用到地方不多，只是在OpenLayers.Popup.AnchoredBubble类中圆角化DIV。-OpenLayers v3.6.0 is here! Check out the

Goals and Background This lab introduces you to a symbolic debugger to use with Java programs. The debugger is part of the free Eclipse IDE. Eclipse is not installed on aludra, but is available on the campus lab machines. However, you may want to