Reprojects feature coordinates from one coordinate system to another using the Blue Marble Geographic Calculator library.


This transformer allows you to specify the coordinate transform through a parameter settings dialog containing controls similar to those found in the Blue Marble Desktop. The controls use the coordinate system definitions (data source), shift data files and workspace settings from a required local installation of the Desktop.

Usage Notes

The BMGReprojector is supported on the 32-bit Windows edition of FME only.

Any coordinate system set on the input features is ignored. A user-specified source coordinate system is required.

Vertical transformations may require specific grid shift files that are available at

This transformer works with both raster and vector data, and is not affected by raster band and palette selection.


This transformer requires the following licenses from Blue Marble Geographics to be installed:

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.

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