使用地图的一个常见操作是设置地图的extent（范围）或获取在其他操作中使用的extent。在map上设置新extent的简单替代方案是调用map的centerAndZoom()方法，该方法基于给定中心点和细节级别（level of detail-LOD）设置新的extent。 如果在初始化map时不包含extent信息，默认 ...

Local residents read in the Yunnan Provincial Library. [Provided to InKunming] The first forum of Asian chief librarians will be held during the forthcoming 13th Asia Arts Festival, which is to be ...