Windows Mobile平台下绘制GIS海量数据的性能优化技术

0ptimizing Technology of Drawing Massive GIS Data under Windows Mobile System

运行于Windows Mobile操作系统下的移动GIS,由于其硬件设备的CPU处理速度慢和内存容量小,严重影响其在移动设备上的应用与推广。针对该问题,提出了开发语言的选择、渲染过程的优化控制、数据的内存映射,及各种数据格式的特殊优化处理等措施来提高移动设备上GIS海量数据的渲染性能,并在WindowsMobile平台下通过实际案例的开发研究,实践了这些技术。通过开发实践证明,采用这些技术提高了GIS数据渲染的时间效率和空间效率,方便了用户的操作。

Because of slow processing rate and low memory capacity of mobile GIS which runs in windows mobile system,application and popularization of the mobile GIS in mobile devices is seriously influenced.To solve this problem,the paper put forward some measures to improve rendering technology of GIS massive data.Measures which are including choosing best computer language,rendering procession optimization,memory mapped of data and special optimization of different data formats to improve rendering capacity of GIS massive data.Additionally,measures above are adopted in cases studies which proved that these measures are efficient for improving rendering efficiency both for time and for space of computer treating GIS massive data.Therefore these measures are availability for consumer to use mobile GIS.