PDA在森林资源数据采集中分幅加载影像图方法探讨

Research on Frame by Frame Loading Images to PDA in Data Collection of Forest Resources

基于PDA的森林资源数据采集是数字林业建设的重要内容,在PDA中加载高分辨率影像图可以更准确地在野外勾绘小班,提高工作效率和精度。但由于PDA的CPU慢、内存小,在加载大量影像图后速度很慢并且容易死机造成数据丢失、工作效率低。笔者通过实践,归纳总结了在PDA中按范围、分幅、准确加载高分辨率影像图的方法,在保证PDA运行速度的基础上提高外业调查效率,为PDA在全省林业野外调查中提供技术支撑。

PDA-based data collection of forest resources is an important part of digital forestry.Loading high-resolution images to PDA can more accurately draw subcompartment,and improve efficiency and accuracy.For the feature of slow CPU and small memory of PDA, loading a large number of image maps causes slow and is prone to crashes resulting in data loss and low efficiency.Through practice,the paper summarized the method of frame by frame accurately loading high-resolution images to PDA by range,which improves the efficiency of the survey on the basis of running speed and provides technical support for using PDA in provincal forestry field survey.