Automatic extraction method and system for four boundaries of house-land integrated land parcel

The invention discloses a method and a system for automatically extracting four boundaries of a house-land integrated land parcel, and the method comprises the steps: obtaining land parcel data, and carrying out the division of each boundary address line of each land parcel according to the land parcel data, so as to obtain the line direction data of each land parcel; according to a preset distance buffer threshold value, carrying out buffer processing on the linear direction data of each land parcel, and carrying out intersection analysis on the buffered data and the corresponding land parcel data to obtain preliminary land parcel four-dimensional data of each land parcel; screening the preliminary land parcel four-arrival data to obtain optimal land parcel four-arrival data; and automatically assigning and outputting the parcel 4-bounds according to the data in each direction in the optimal parcel 4-bounds data. According to the method, automatic batch extraction of the parcel four bounds can be realized, a