Q: Import the CAD to a simple dataset. After importing, you want to change the millimeter unit into meters. What to do?
A: Reset the coordinate system, and change the coordinate unit to the meter unit. But it just changed the unit name, and the coordinates did not change. The next step is to use the rectangular registration method to match the CAD data. Input control point coordinates information, and ensure that it is one thousandth of the coordinates of the reference point.