中文摘要：

［1］Blakemord M. Generalization and error in spatial databases. Cartographica, 1984,21,131～139 ［2］Dai H L,Xu P L, Lu X S. The variance estimation of corresponding line through overlay operation within GISs.Journal of Wuhan Technical University of Surveying and Mapping, 1998,23(1): 14～17(in Chinese) ［3］Dai H L. The propagation models of postitional uncertainty in vector GISs: [Master Thesis]. Taian: Shandong Mining University, 1998 (in Chinese) ［4］Liu W B. Modeling uncertainty of spatial data in GISs and remote sensing: [Ph. D Thesis]. Wuhan: Wuhan Technical University of Surveying and Mapping , 1995(in Chinese) ［5］Liu W B,Dai H L. Analytical representation of positional uncertainties of line features in GIS. ACTA Geodaetica et Cartographica Sinica , 1998,27(3) :231～237 ［6］Mikhail E M. Observations and least squares. New York: IEP, 1976 ［7］Wang L X, et al. Advanced Mathematics Handbook. Beijing:High Education Press, 1983(in Chinese) ［8］Yu Z C, Lu L C. Adjustment of Observations. Beijing:Publishing House of Surveying and Mapping, 1983 (in Chinese)

英文摘要：

In this paper, the positional error curve of point features was extended to an error curves band of line segment features. Firstly, the constitution and shape of the error curves band were analyzed. On this basis, the general boundary curve formula of that band was derived. Secondly, the visualizing error curves bands were realized through three examples. Finally, area index has been examined by comparing numerical results from error curves band and error ellipes band.