A Watermarking Algorithm for Vector Maps in Spatial Domain

Digital watermarking algorithms for vector digital maps are an efficient method to counter abuses of the maps.We analyzed current methods of watermarking for digital vector geo-data and presented a new robust blind watermarking approach.The proposed algorithm starts with the area subdivision,then watermarking is embedded into length of vector by changing some x coordinates or y coordinates.The experiments show that the proposed algorithm could effectively resist the attack of noise,removing points,adding points,deleting points,and so on.