To Import a Data File
1. On the Model tab, click the arrow next to Point, and then click 
Offset Coordinate System. The Datum Point dialog box opens.
Offset Coordinate System. The Datum Point dialog box opens.2. In the graphics window, select a coordinate system to use for points placement.
3. In the Type list, select the coordinate system type. Choose from Cartesian, Cylindrical, or Spherical.
4. Click Import. The Open dialog box opens.
5. Select a *.pts file to import. The points that you import are added to the points table. Each row contains one point.
6. Click OK to accept the points and exit the dialog box.