| GPS技术在县级土地利用动态监测中的应用 |
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| 引用本文： | 王晓栋,崔伟宏.GPS技术在县级土地利用动态监测中的应用[J].遥感学报,1999,3(4):318-323. |
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| 作者姓名： | 王晓栋 崔伟宏 |
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| 作者单位： | 中国科学院遥感应用研究所,北京,100101 |
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| 基金项目： | 国家“九五”重中之重科技攻关项目 |
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| 摘 要： | 准确、定量地把握土地利用及其变化状况具有重要的意义。全球定位系统（ＧＰＳ） 在土地利用动态监测中既是遥感技术的辅助定位手段,也可以作为独立的数据获取手段。介绍了ＧＰＳ定位方式和特点,结合中国国家“九五”攻关项目,讨论了县级土地利用动态监测中的ＧＰＳ选型思路和综合考虑ＧＩＳ功能的ＧＰＳ数据获取方法。通过实验证明了２Ｄ异常数据处理方法和ＧＰＳ数据处理中“假５４”代替“真５４”的可行性。这些结论将有效地提高内、外业工作效率和数据精度。
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| 关 键 词： | 全球定位系统 土地利用 动态监测 |
| 收稿时间： | 9/7/1998 12:00:00 AM |
| 修稿时间： | 1998-09-07 |
Application of GPS in Dynamic Monitoring of Landuse at County Level |
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| WANG Xiao-Dong and CUI Wei-Hong.Application of GPS in Dynamic Monitoring of Landuse at County Level[J].Journal of Remote Sensing,1999,3(4):318-323. |
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| Authors: | WANG Xiao-Dong and CUI Wei-Hong |
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| Institution: | Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101;Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101 |
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| Abstract: | Withthe advance ofthesociety and economy, land is decreasing rapidly.Governmentneedsexactand quan titative data aboutlanduse statusto make reasonable decisions. However, traditional methods concerning dynamic moni toring oflanduse havelow efficiency and poor precision.Therefore, a better method tosolvethis problem isneeded.The developmentof Space Science gives us a chance. Remote Sensing can forwardly find the changed regions, Global Posi tioning System can determinethe accuratelocations oftheregions, and GeographicalInformation System can manage vari ous data asa platform.GPScan notonlyserve asan auxiliary positioning meansafterhavingfoundthetargetregionsfrom remote sensing data, butalso actas an independent data acquisition method.This paperfirstlyintroduces several basic GPSpositioning methods and their precision, and then, discusses the requirements of dynamic monitoring oflanduse at countylevel, which decidesthe modelselection of GPSreceiverand working pattern of GPS'outdoorsurveying.Combin ing a key projectof"the Ninth Five year Plan", the authors describefive kindsof GPSacquiring data methods with com prehensive consideration of GIS'functions.The disadvantageoussurveyingconditions willleadthecreation of"2Dabnor mal data", which can notreflectthetrue world. Deletingthe "2Dabnormal data"from original data set can provide an alternative with good authenticity.Deletingthe "2Dabnormal data"meansthe loss of acquired data.But under certain conditions, thisloss will notaffectthe computation results'precision and reality.The data acquired by GPSreceiversis based on WGS 84, but our basic databaseis on Beijing 54.Rationalresolventis "true 54"theoretically.Here, "pseu do 54"thoughtis proposed and proved feasible in Jiaoqu County, Baotou City by a large number oftests.The conclu sions could effectivelyimprovethe efficiency ofindoorand outdoor work, and improve data precision. |
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| Keywords: | Globalpositioning system Landuse Dynamic monitoring |
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