基于集群环境下的地理国情普查DOM生产

Multi-source DOM Production in Geographical Conditions Census Based on PCs Cluster

利用多源航摄影像数据制作DOM是地理国情普查工作的重要技术手段。以湖北省地理国情普查项目为例,介绍在集群环境下,对海量数据的数字摄影测量处理。研究利用集群对海量数据的计算效率,分析任务调度和远程监控在海量数据生产中的意义,同时比较单线程处理、多线程处理和集群环境的效率。结果证明,基于集群环境下的DOM生产在地理国情普查中能有效提高生产效率,保障数据的现势性和更新效率。

Taking the production of geographical conditions census in Hubei Province for example, this paper introduced the DOM production method of massive data based on PCs cluster. The result was evaluated from the accuracy and efficiency of DOM procedure. And then, the paper analyzed the significance of task scheduling and remote monitoring in the production of massive data, and compared the efficiency of single thread, multi thread and cluster. The results show that the production method based on the PCs cluster in geographical conditions census can improve the efficiency, and guarantee the data update efficiency.