西部测图移动GIS安全自救保障系统关键技术

为解决西部测图安全自救保障所必需的海量移动地理空间信息服务与移动PDA终端弱硬件资源、弱计算能力相矛盾的问题,采用试验的方法,研究了在PDA移动终端实现快速海量移动地理信息服务的可行性。结果表明:在"卡片式"数据索引的基础上进行"刀片式"数据组织管理的数据模型是一种有效的移动终端数据组织模型;在层次化空间格网索引的基础上,地理空间信息分割是解决硬件资源有限性的一种现实有益方法;移动安全自救被动定位是有缺陷的,必须有终端链路上传通道才有效。该系统的研发应用表明该成果对于普遍性的移动安全应急救援保障系统建设具有现实的借鉴意义。

Key technologies of mobile GIS self-protection system in the western mapping project

Massive-mobile geographic spatial information services are the basic requirements of mobile GIS self-protection system in "The Western Mapping Project",which are conflicted with the weak hardware resources and poor computing capacities of the mobile terminal PDA(personal digital assistant).In order to resolve such problems,experiments are carried out to prove the feasibility of performing massive-mobile geographic spatial information services.Research results demonstrate that data model of blade data organization management is an effective mobile terminal data model on the basis of the card data index.Based on the multilevel spatial grid index,the division of geography spatial information is a realistic and effective solution;Self-protection system of mobile GIS passive position is defective and terminal link up channel is needed to work out effectively.According to the research and equipping of the system,It is found that the production has a realistic reference to building the common self-protection system.