====== Système de coordonnées multiple ======

I understand that you have created a DWG with a surface in Civil 3D and used CH1903 coordinate system.
You want to add another point file data source, but this is in WGS84. You want to know if there is a way to transform the points during import.

If it is a point file you can load via the point tools you can apply a coordinate trasnformation during import, see attachment.
See also the Civil 3D help files for more information :

  * [[http://knowledge.autodesk.com/article/Transforming-coordinates-of-imported-point-file|Transforming coordinates of imported point file]]
  * [[http://help.autodesk.com/cloudhelp/2016/ENU/Civil3D-UserGuide/files/GUID-F50B554A-90E6-41CA-80F2-B6A7C8637F7D.htm|Point File Format Dialog Box]]
  * [[http://help.autodesk.com/cloudhelp/2016/ENU/Civil3D-UserGuide/files/GUID-7B81CCC9-B538-4E32-869E-AE08135AD7AD.htm|About Point File Formats]]

Alternatively, it is possible to reproject the point file data via a FDO connection and a Data Query. A How To description can be found in the Map 3D Help or as an Article here :
  * [[http://knowledge.autodesk.com/article/An-existing-drawing-with-a-defined-coordinate-system-needs-to-be-converted-into-another-coodinate-system|An existing drawing with a defined coordinate system needs to be converted into another coodinate system]]