基于PDA的土地变更调查系统设计与实现

针对土地资源的日益紧张,提出了多种土地利用状况调查技术方法,但是在外业土地变更调查方面,仍然不能快速、及时、准确的提供现势性数据。不能提供用户多源信息(专题信息及辅助GIS、RS、GPS等信息)平台是其中关键问题之一。提出在PDA基础上建立移动GIS环境下的土地变更调查综合系统。实现移动GIS环境下的遥感信息与GIS专题信息有效结合、变化信息核实、外业GPS量测与数据处理、土地利用数据更新及自动更新专题数据库等。在实践应用过程中证明,该方法切实可行,使土地利用变更调查的效率和精度大幅提高,是一种有广泛应用前景的技术方法。

Design and realization of land use change investigation system based on PDA

Many different methods of land use change investigation have been put forward.because of land resource decreasing.But they can not provide quick and accurate data.Taking into account of these factors,the key point is that they can not make use of multi-resource information(e.g.thematic information,remote sensing data,and global position system data) and construct a platform for users.In this paper,an integrate system is designed with mobile GIS,RS,GPS based on PDA,and field GPS surveying is carried out,integrating remote sensing information and thematic GIS information etc.,land use data updating,thematic database automatic updating with investigation data.According to this methodology,the efficiency and accuracy of land use change investigation is greatly improved.Finally,practical application shows that it is a good approach for application in the project about investigation.