土地变更调查掌上系统设计与实现

Research on Land Change Survey System on Palm

土地资源是人类生存的重要基础,摸清土地资源现状及时掌握土地变化信息,是进行土地利用总体规划和国土资源宏观决策的依据。为了提高土地变更调查的效率,设计了掌上土地变更调查系统。系统基于PDA将GPS卡、GSM、数码摄像头集成于一体,利用高精度GPSOEM板和GSM实现了GPS实时差分处理,形成一个小型轻便的土地变更调查系统。在WindowsCE环境下,利用eVC编程语言完成了系统的开发,实现了变更图斑测量、GPS数据解算、土地利用现状图更新等功能。从而解决了传统土地变更调查周期长、效率低、精度不高等问题。

Land resources are essential to human survival. To ascertain the actual situation of land resources and information of land change serves as a basis for overall planning of land use and macroscopic decision making on land resources. In order to raise the efficiency of land change survey, this paper designs a Land Change Survey System on Palm （LCSSP）. Based on PDA, this system integrates GPS card, GSM and digital camera, which adopts real time differential process to improve positioning precision. Thus LCSSP becomes a pocket field land change survey system with high precision. Under Windows CE environment, functions of the system, such as land change survey, GPS data process, vector data edit and so on, are developed by using eVC （embedded visual c＋＋ ） program language. LCSSP fundamentally solves some inherent problems including long cycle, low efficiency, and low precision in land change survey.