1、直接在arcmap上加载时,显示。The following data sources you added are missing spatial reference information.
This data can be drawn in Arcmap,but cannot be project
应该是dwg文件有问题。dwg文件没有坐标系,所以提示“The following data sources you added are missing spatial reference information.This data can be drawn in Arcmap,but cannot be project.”,加载没有坐标系的shapefile时也会有这个提示,但是是可以正常显示的。你可以用CAD先看看是不是dwg文件的问题。