Multidimensional space angle method for alteration information abstraction from vegetation covered area has been presented in the light of spectral angle mapping in this paper. 摘要基于光谱角制图法，提出运用多维空间角度方法来提取植被覆盖较好区域的遥感图像蚀变信息。
It will facilitate dissemination of transport information to the public via established distribution channels such as variable message panels and electronic mass media. 利用这系统，运输资讯可通过路旁的可变信息屏幕或电子传媒发放。
