FME Filenames and Locations

Dataset Locations

Click on readers and writers in the Navigator and select Open Containing Folder (Ctrl + O).

File Extensions

FME has many associated file extensions. The default locations are listed here but can also change depending on where you installed FME.

Filename/File Extension

Type/Description

Default Location

coordsys.db

Contains the names and descriptions of all predefined coordinate systems.

FME installation folder

 

.fds

Custom Formats

My Documents\FME\Formats

.fme

 

FME mapping file (FME Quick Translator)

User-defined

.fmf FME metafile - Used to configure format definitions. FME installation folder, metafile subfolder
.fmelic FME license file User-defined

.fmv

FME Viewspace - Used by the FME Data Inspector to load a predefined view.

User-defined

.fmw

 

FME Workbench workspace

 

My Documents\My FME Workspaces

 

.fmwt

FME Workbench template - Used to package an FME workspace and source data.

This extension is also used for templates downloaded from FME Hub.

My Documents\FME\Templates

.fmx

Custom transformers

My Documents\FME\Transformers

.fmxlist

User-defined transformer list

My Documents\FME\TransformerCategories

.fmc

FME catalog file

Contains instructions to direct Workbench to download a specified resource. Since these files contain only instructions (XML), they are small in size.

 
.fps FME Feature Store (FFS) pointcloud sidecar file - Used to store FFS point cloud data.  
.frs FME Feature Store (FFS) raster sidecar file - Used to store FFS raster data.  
.fsi FME Feature Store (FFS) spatial index file - Used to store the spatial index for FFS datasets.  

.gdc, .gsb, .las, .los, .mrt, .txt, .csv

Coordinate system and grid data files

Reproject

Reproject\GridData

MyCoordSysDefs.fme

custom coordinate system definitions

FME installation folder, Reproject subfolder

LocalCoordSysDefs.fme

This file is automatically loaded and made available to each FME session, to allow sites to add their own coordinate systems. It contains a series of COORDINATE_SYSTEM_DEF, DATUM_DEF, ELLIPSOID_DEF, and UNIT_DEF lines that define additional, site-specific coordinate systems.

You can edit these files to add your own definitions.

Reproject subfolder under the FME installation folder

Defining Custom Units