本人用VC编写的由水系图求水系密度程序源码，对GIS开发的朋友可能有些帮助，目前只支持灰度分析，彩色分析正在编写中。-I VC prepared by the water stream density map for procedures source, on the development of the GIS may help to a friend, only to support the gray analysis, color analysis being prepared.