Configuring Grid Transformation Definitions

To reproject between coordinate systems that have different datums in workspaces run from FME Flow, use a grid transformation override file that references custom grid files.

You must make the desired changes in FME Workbench, then manually copy the applicable grid override file to FME Flow.

  1. In FME Workbench, click Tools > FME Options > Coordinate Systems, and edit the applicable grid transformation.
  2. On the Resources page of the FME Flow Web User Interface, open the Engine folder. If the sub-folder GridData does not exist, create it.
  3. Upload the grid file(s) to GridData.
  4. Locate the applicable grid override file from the FME Form machine:

    5. Windows:

    <user>\My Documents\FME\CoordinateSystemGridOverrides\<grid_override_file>.txt

    Linux:

    > ~/.fme/CoordinateSystemGridOverrides

  5. Make a copy of the grid override file.
  6. Open the copy in a text editor. You will see a relative path to the .\GridData\<GRID_SHIFT_FILE> file. Change the relative path to a fully-qualified path:

    7. Windows:

    C:/ProgramData/Safe Software/FMEFlow/resources/engine/GridData/<GRID_SHIFT_FILE>.gsb

    Linux:

    /data/fmeflow/resources/engine/GridData/<GRID_SHIFT_FILE>.gsb

    Note  If any part of the path contains spaces, enclose the entire path in quotation marks (""). If paths containing spaces are not enclosed in quotation marks, the FME Flow Engines service may fail to restart.
  7. Save and close the file.
  8. On the Resources page, upload the grid override text file to the CoordinateSystemGridOverrides folder, under Engine.
  9. Restart FME Flow.