中文摘要：

提出了在移动设备上实现数字地球的框架模型，针对移动数字地球对网络流量、计算能力和存储能力的限制，框架增设中间件服务器，由其完成从分布式地理数据服务器集群获取数据并渲染虚拟场景的过程，渲染结果以流媒体为载体反馈给移动设备。依此框架开发出原型系统，测试结果表明，在实现远超移动设备计算和存储能力的虚拟场景的同时，可有效降低构建移动数字地球的网络流量，并随着移动网速的进一步提升，可达实时交互控制。

英文摘要：

One framework of distributed Mobile Digital Earth was proposed. To overcome constraints such as massive network traffic, higher computation and storage demands, middle-ware servers were plugged in. Those constraints mentioned above were done on network and middle-ware servers instead of mobile instruments, with a result of stream media sent on to mobile instrument which is smaller on data amount and less demanding on the computing power. Based on the framework,one prototype system was achieved. Results show that prototype system works well, and the interaction will be much more real-time with mobile network bandwidth＇s upgrade.