Method and device for extracting section line from oblique photography data

The invention relates to the technical field of data analysis, in particular to a method and device for extracting a section line from oblique photography data, computer equipment, a storage medium and a computer program product. The method comprises the steps of dividing oblique photography data into a plurality of block files according to geographic grids, setting root nodes in one-to-one correspondence with the block files in each block file, and hierarchically storing node files corresponding to child nodes derived from the root nodes in the block files; finding out a target block file and a target node file which intersect with the projection line data; reading specific geometric data in the target node file, wherein the geometric data is associated with section line extraction; and traversing geometric data in all the target node files by using a preset intersection algorithm to obtain profile points, and connecting the profile points to generate a target profile line. By adopting the method, the effici