Method and system for extracting contour line of right-angle house on house inclination model

The invention provides a method and system for extracting a contour line of a right-angle house on a house inclination model, the inclination model is composed of a plurality of triangular meshes, and the method comprises the following steps: obtaining a target point on the inclination model, and interpolating model points based on a preset point extraction density to form a corresponding point set; based on the point set, clustering analysis is carried out according to the proximity of points, and an optimal point cluster is generated; based on the optimal point cluster, extracting a model point cloud in a corresponding elevation range from an inclination model; determining a plurality of target point cloud clusters included in the model point cloud based on relative position clustering analysis between each point in the model point cloud and adjacent points; performing line segment fitting and right-angle correction on each target point cloud cluster to form a line segment set; and constructing a closed con