论文标题:基于PDA上的农业调查数据采集系统研究
Collection System Study of Agriculture Survey Data Based on Technique of PDA
论文作者 张俊青
论文导师 张荣群；朱德海,论文学位 硕士,论文专业 地图学与地理信息系统
论文单位 中国农业大学,点击次数 137,论文页数 45页File Size4999k
2005-06-01论文网 http://www.lw23.com/lunwen_638867102/ 掌上电脑;全球定位系统;嵌入式地理信息;WinCE;农业数据采集
PDA; GPS ; eSupermap ; WinCE ; Agricultural Data Collection
近年来,我国的农业科技工作得到了极大的发展,但农业调查数据的采集手段还比较落后。因而,提高数据的采集能力和管理水平,特别是运用信息技术,建立完整的农业调查数据采集系统,实现采集的信息化已经势在必行。 本研究以北京超图地理信息技术有限公司的eSupemlap GIS平台、Embedded Visual C++为软件开发工具,研制了一套基于PDA上的农业数据信息采集系统。在程序算法实现过程中,采用面向对象的程序(OOP)设计思想、结构化查询语言(SQL)以及关系型的数据存储等技术实现了程序的可移植、算法的封装和数据的通用,提高了系统的稳定性。结合GPS和GIS技术完成数据的精确采集、GPS数据的接收、处理、空间数据与属性数据的保存、检索、定位以及数据传送等关键问题的研究、开发。 在研究过程中,我们首先对GPS的接收数据格式进行分析,然后研究在嵌入式地理信息系统中如何读取GPS空间数据,形成空间数据采集层;设计了属性数据采集系统,并将属性数据与空间数据在采集过程中实行一体化管理;利用GPS定位技术实现定点定位,达到重复性采集数据的需求。该系统能够实现属性、空间数据与管理系统的无缝结合。本研究为外部的GIS矢量文件提供完全封装的数据接口,并不针对任何一种GIS数据格式。 本研究实现了农业调查数据的信息化采集,提高了数据采集的效率,解决了历史数据的比对利用问题,在实际应用试验中取得了令人满意的效果。
In recent years, Great progress has been made in the field of agricultural science and technology while the collection of agricultural survey data is still relatively lagged. So, the improvement of collection method and management level, especially applying information technology to set up a set of collection system of agricultural collection data, is on the way.The study has taken eSupermap as GIS platform、 Embedded Visual C++ as tools of system development. A lot of techniques such as the idea of the OOP, SQL and the relation data memory to realize the program"s transplant in the process of program"s arithmetic design and the normalization of data has been applied in our study, thus improving the stability of collection system.Our study is to improve the collection method of agricultural survey data, and a set of collection system of agriculture surveying, data based on the GPS/PDA technology, was finished. During the process of designing system, we pay more attention to the seamless integration among GPS data, attribute data and the collection system. To improve the automatization of agriculture survey data collection, the study have referred to the use of GPS and GIS in vehicle navigation、 filed geographic data collection and communication management. Collection and storing scheme was designed and the location positioning and real-time communication has finished. At the same time, the protected interface to vector file of outer GIS is provided in the system, which in some degree, solve the problem of the GIS"s use among different platforms.
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