详细说明：ArcGIS的文档文件*.mxd对外格式是不公开的，里面保存有当前各图层名称、符号、颜色、线性、字体等属性特征，通过ULTRAEDIT读取其二进制格 式，编程实现获取点、线、面图层名称、存放路径，mxd文件图层个数等相关信息的读写功能-Arc GIS Documents*. mxd external format is not open, and inside the layers to preserve the current name, symbol, color, linear, fonts and other attributes, through Ultraedit read its binary format, programming access points, Line, surface layer name, storage path, mxd document the number of layers and other related information to read and write functions