METHOD FOR CREATING VECTOR AND POLYGONAL MODELS OF BUILDINGS BASED ON THE DATA OF LASER LOCATION SURVEY OF THE AREA Russian patent published in 2022 - IPC G06T17/05 

FIELD: spatial information processing and displaying.

SUBSTANCE: invention relates to the field of processing and displaying spatial information and can be used to build cartographic terrain models based on three-dimensional digital terrain models. The effect is achieved due to the fact that by means of aerial laser shooting a cloud of points of all objects of a given area is formed, an area is selected that visually corresponds to the roof of the building, and then three-dimensional objects are built. The points that fall into the area corresponding to the roof of the building are placed in the array of roof points. Then an ordered set of roof contour points is formed. Further, by the points of the outer contour of the roof, segments of the roof boundary are constructed and the contour of the first approximation is formed, the segments of the contour of the first approximation are connected into a closed contour. Planes of 3D roof geometry are defined, interior edges of the roof are defined as mutual intersections of the resulting set of 3D roof geometry planes, edge edges of the roof are defined as the intersection of the obtained set of 3D roof geometry planes with vertical planes drawn through the boundary of a closed contour. The intersection of the edges of the edge of the roof with internal edges on the given plane determines the edge of the roof. Neighboring external edges of the roof are compared with each other, if the points of their intersection with the internal edge are at different distances from the middle of this internal edge, then the position of the true end of the edge of the roof edge is taken as the end more distant from this middle. Next, the vertical faces of the building walls are formed, connecting the edges of the roof edge with a horizontal plane located at the average height of the relief in the area of the building. According to the found parameters of edges and faces, a vector or polygonal model of the building is formed.

EFFECT: reducing time costs and increasing the accuracy of generating vector and polygonal models of buildings based on the initial point cloud, as well as reducing the influence of the human factor on the quality of the resulting models.

3 cl, 7 dwg