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《ACTA GEODAETICA ET CARTOGRAPHIC SINICA》 2000-01
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An Approach for Modeling Error of Generic Curve Features in GIS

SHI Wen zhong 1,TONG Xiao hua 1,2 ,LIU Da jie 2(1.Dept.of Land Surveying and Geo informatics, The HongKong Polytechnic University, HongKong; 2. Dept.of Surveying and Geomatics, Tongji University, Shanghai,200092)  
This paper presents a study on a generic approach for modeling error of curve features in GIS. Error of curve features is determined by the error of the points that constitute the curve. The error is described by weighted average variance covariance of (a) root mean square error in curve normal direction ( ε σ ), and (b) error in the direction with maximum error (ε m ) respectively. Taking the three order basic Spline curve as an example, the implementation of model is illustrated. This result is visualized and further compared with the results based on line segment and circular curve line error models.
【Fund】: 国家自然科学基金!(编号:49671065);;香港特别行政区政府大学资助委员会基金!(编号:Polyu593)资助
【CateGory Index】: P208
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