Abstract: A logical consistency defect between some linear features and patches of land survey data leads to the calculation error of land use patches. To solve the problems, this paper studies the logical relationship between lines and polygons of land survey data, summarizes the defect types of linear features crossing the patches, analyzes its causes and effects, and designs a method to correct the defect by incremental update mechanism. This method does not affect the analysis of land type flow. It can maintain the consistency of statistical results between standard time point of land survey. It is easy to realize the automatic processing of defect correction. And it facilitates data backtracking. The method is applied and verified in the national database quality inspection of land survey. It shows that it is helpful to improve the efficiency of data inspection and has a practical value.

Key words: linear features, land use patch, land surveying, incremental update, land type flow