Research on Algorithm for Checking Overlap of Land Elements in Cadastral Database Based on AutoCAD.NET
[Purposes]This paper aims to solve the problem of overlapping land elements in the process of building cadastral data databases,improve the quality of cadastral spatial data,and ensure the topologi-cal spatial consistency of the data.[Methods]This paper identifies the overlap types between features based on the nine intersection model of spatial topological relationships and uses AutoCAD on the Auto-CAD platform NET's Boolean operation mechanism to achieve automatic extraction of element overlap.[Findings]The automated inspection tool has achieved overlap checking between various land elements in cadastral spatial data,which can directly process the data and generate DWG files with multiple defor-mations and positioning overlaps.[Conclusions]Based on AutoCAD The automated inspection tool devel-oped by NET can accurately detect overlapping polygons,avoiding the drawbacks of heavy workload and error-prone manual inspection,and improving the quality and mapping efficiency of cadastral spatial data.
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