- Click File | Open, select your data file, and click Open to open the file in Surfer's worksheet.
- Click Data | Coordinate System | Assign Coordinate System.
- In the Assign Coordinate System dialog, navigate to the appropriate coordinate system (e.g. Predefined | ProjectedSystems | UTM | North America | NorthAmericaNAD83zone10N).
- Click OK.
Please note that in order for the data file to be linked to the external spatial reference file, they both need to be in the same folder. If the data file is moved and the GSR2 file is not, the spatial referencing will no longer be linked to the data file.
Updated October 31, 2018