Abstract

In thearticle, we introduce solutions to improve the spatial accuracy of the oldcadastral maps, which were measured and established before 2009 according tothe old regulations. From analyzing the factors affecting the accuracy of theold cadastral map compared to the current requirement, to realize the extent ofrestriction by each measurement area in each administrative unit of commune /ward, Since then, we have proposed an improved algorithm, a high-precisionsolution solution for each measurement area and of the commune / ward ingeneral based on the overlapping control points, thereby creating a basis forVPAI software module development. Running on MicroStation has the function ofimproving spatial accuracy. The improved data will be more consistent with thecadastral data measured in recent years, ensuring the establishment of the landdatabase. The article is the result of a research project at the grassrootslevel "Research and propose technical solutions to improve the efficiencyof the old cadastral map to meet the requirements of building a land databasein the current period".