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提出了一种基于三角函数变换的比例乘法器法，解决了方位角和径向距离的坐标变换，最终转换为视频存储器中的位图地址，实现了电子海图系统雷达信息的转换。
A proportional multiplier method based on trigonometric function transformation is proposed to solve the coordinate transformation of azimuth and radial distance and finally to bitmap address in video memory to realize the conversion of electronic chart system radar information.