Select Tools > Options and click the Coordinate Systems icon.
Note that coordinate systems are used differently in the ArcGIS Data Interoperability extension.
Installing FME from the CD will ensure that the grid shift files provided by Safe Software are already installed in the correct location. To view the list of installed files, see Included Grid Shift Files.
If you installed a beta or downloaded version of FME, you can add these files with the Grid Shift File Installer available on the Datum Transformations and Grid Shift Files fmepedia web page.
This option allows you to maintain and edit grid files. You can manage the grid files by selecting a file and clicking the Edit button (or, simply double-click the file). The dialog that appears lists one or more grid shift files:
Move Up and Move Down buttons: Rearrange the precedence of the files.
Add button: Opens a file browser so you can select a new file and add it to the list.
Remove button: Delete an entry from the displayed list.
Fallback Datum: Select the datum to use if the selected grid file does not cover the area of your input data. Fallback datums are listed in individual .gdc files, which you can open with any text editor.
Click OK to apply changes, and Cancel to discard changes.
WARNING!
If you add a file, you are not copying the file – you are only pointing to the file’s location. Thus, if you delete a file from its original location, the entry you create here will point to a nonexistent file. Safe Software recommends that you copy each grid file to FME’s Reproject\GridData subdirectory before adding any files to your configuration.
Follow these steps to install a grid file so that FME will recognize the file:
Copy the new file to FME's Reproject\GridData subdirectory.
Select Tools > Options and click the Coordinate Systems icon.
Select the applicable datum shift and click the Edit button.
A dialog displays the files already recognized by FME for the applicable datum shift. To include new files, click the Add button, browse to the applicable directory and find the file in Reproject\GridData subdirectory.
Select the file and click OK.
For additional information on grid shift files, see the Coordinate Systems section of this help file, or view these specific topics:
Datum Grid Shift File Overview