摘要
通过分析线状地物基本单元基本平差准则和方法,细化了变更行为并分析每一种变更类型的数据流向,设计并实现了一种能严格维护基本单元逻辑一致性的平差算法,并在实际应用系统中得到了验证。
The basic unit is the smallest change object of elements in land survey database updating.It was obtained from the overlap of features in two different periods,which reflect the change from one time to another.After the rounding operation,the length of linear features in the basic unit is not equal to the sum or difference of before and after lengths.It leads to logical inconsistency,which should be adjusted.Analyzed the basic adjustment criteria and methods of linear features in the basic unit,refined the change behaviors to 10 types and clarified the data flow of each change type,an adjustment method can maintain the attributes logical consistency of linear features strictly was designed and implemented.The methods was applied and verified in the land-use data management system LandEx.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2011年第7期853-856,876,共5页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2009AA12Z222
2007AA12Z182)
浙江省科技攻关计划资助项目(2009C33011)
国家教育部博士点专项基金资助项目(200803350017)
浙江省自然科学基金资助项目(Y5090130)
关键词
线状地物
基本单元
平差
土地调查
linear features
basic unit
adjustment
land survey
