الوصف
A novel digital watermarking method is presented, for maps’ polygons, for embedding two watermarks in LSB (Least Significant Bit) of an angle and a side of a polygon, using random tables. One of the challenges that faced watermarking technique is that angles and distances are not changed easily in vector data. The proposed method overcomes this challenge since it is robust to scaling. The proposed method doesn’t cause any distortion or topological change for maps because of the voting feature in the method. CR (Correspondence Ratio) is used to validate the embedding effectiveness. Recorded test results show that the presented method outperforms methods previously known in the literature. Therefore, the proposed method could be used in various fields to protect the copyright of vector map