Abstract: A compound watermarking algorithm for digital raster map is proposed based on wavelet transformation in this paper. The basic idea is to embed the robust watermark and the fragile watermark into different frequency blocks of the digital raster map based on the features of digital raster map with higher luminance and greater sensual capability than image data. The robust watermark is adaptively embedded into low frequency section to protect the copyright of the data. The fragile watermark is embedded into high frequency section by the dithered modulation technique to achieve the goal of content authentication according to the characteristics of human visual systems. The experiments show that the proposed algorithm can attest content integrity for digital raster map, and is robust against various malicious attacks such as JPEG compression, sharpening, cutting etc.