Method for using man-made feature sparse shape points to automatically generate feature contour

The invention relates to a method for using man-made feature sparse shape points to automatically generate a feature contour. The method has the advantages that a feature contour method based on a genetic algorithm is applied to a construction feature region description system, and the feature contour is generated automatically through the feature sparse shape points; a good sealing line connection scheme is searched accurately through the successive generation optimization operation of the genetic algorithm so as to form the feature contour region; the method is applicable to description of optional sealed regions, so that area equal-quantity statistic can be performed on one region; in addition, the time defects using a violence method for searching and the precision defects of a greedy algorithm are overcome, and time-precision balance can be achieved; due to the fact that the genetic algorithm is high in robustness, the genetic algorithm is quite applicable to sketching of real world complex regions.