Looks up coordinate system names and definitions between FME’s internal format and common third-party and open source representations, storing the results as an attribute.

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Typical Uses

  • Finding EPSG numbers
  • Troubleshooting unknown or custom coordinate systems and reprojections
  • Extracting coordinate system information to save as metadata

How does it work?

The CoordinateSystemDescriptionConverter receives any type of feature, with an attribute containing either:

  • the FME representation of a coordinate system
  • a coordinate system representation in any of these forms:
    • Autodesk WKT (Well-Known Text)
    • EPSG number
    • Esri WKT (Well-Known Text)
    • Esri WKID (Well-Known ID)
    • MapInfo string
    • OGC WKT (Well-Known Text)
    • Oracle SRID (Spatial Reference ID)
    • PROJ.4 string

The transformer will convert the provided representation either from or to the FME form and store the results in an attribute. The geometry is not modified.


Usage Notes

  • The FME representation of a coordinate system can be extracted into an attribute with a CoordinateSystemExtractor.
  • If an FME coordinate system name cannot be found, _FME_0 or similar variations may be seen.

Working With Coordinate System Transformers

FME inherently supports coordinate system transformations and reprojections.


Input Ports


Editing Transformer Parameters

Using a set of menu options, transformer parameters can be assigned by referencing other elements in the workspace. More advanced functions, such as an advanced editor and an arithmetic editor, are also available in some transformers. To access a menu of these options, click beside the applicable parameter. For more information, see Transformer Parameter Menu Options.

Defining Values

There are several ways to define a value for use in a Transformer. The simplest is to simply type in a value or string, which can include functions of various types such as attribute references, math and string functions, and workspace parameters. There are a number of tools and shortcuts that can assist in constructing values, generally available from the drop-down context menu adjacent to the value field.

Dialog Options - Tables

Transformers with table-style parameters have additional tools for populating and manipulating values.


Processing Behavior


Feature Holding


Dependencies None

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Examples may contain information licensed under the Open Government Licence – Vancouver and/or the Open Government Licence – Canada.