Contour operations and contour calculations play an important role in applications such as database communication, decision support, data visualization, and spatial databases. This paper analyzes existing methods, points out their problems in progressive processing, query efficiency, and user convenience in post-screening, and proposes a 3D dynamic cut surface contour query algorithm based on the contour point dominance theorem and the application of spatial geometry principles. Its feasibility, efficiency, and accuracy are demonstrated through case analysis and experiments. Keywords: contour; dominance; progressive processing
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