To Add Point Set Data to the Existing Data
1. Click > 
Add. The Open dialog box opens.
Add. The Open dialog box opens.2. Select a points file.
3. Select a coordinate system as a reference for the point set insertion. The point set is added to the existing point set. The two point sets are merged as a single point set for further point set operations.
 | Use sampling to delete points that may overlap after the addition of the point set. |