Note: Support for the MRFClean transformers is no longer provided as of FME 2022.0. Please contact Safe Software for alternative transformers that can be used to transition your FME workspaces.

The MRFCleaner repairs geometry, particularly during data migration from CAD to GIS, and is built upon the MRFCleanFactory, which is an integration of MRF’s cleaning technology into FME.

The MRFCleaner fixes geometric problems in input data such as line overshoots and undershoots within the user-specified tolerance. It is useful for multi-layer and multi-tolerance three-dimensional data cleaning. Typical applications include the correction of utility maps, parcel maps, topographic maps and resource maps as data is migrated from one system to another.

The MRFCleaner includes the following functionality:

  • fuzzy tolerance
  • extending lines
  • weeding lines
  • joining lines
  • processing short elements
  • removing gaps
  • removing duplicates
  • removing dangles
  • performing conflation

The number of layers used in cleaning the data is determined by the number of different cleaning tolerance values of input features. Features that have the same cleaning tolerances are processed as being on the same layer. This allows feature data from a high-quality data source to be assigned a low cleaning tolerance and integrated with data from a lower-quality data source which would be given a larger cleaning tolerance.

Geometries such as path, polygon, donut, ellipse, elliptical arc, multi-area, multi-curve, text, and multi-text are converted to basic geometries such as point, line, path, arc or multi-point prior to the cleaning process. The cleaner understands and works with circular arcs. Input features with invalid geometries are ignored and deleted.

Usage Tips

You can also use one more of the following transformers to perform singular MRFCleaner operations. These transformer parameters are all available as part of this MRF2DCleaner transformer, but you may wish to use separate transformers so that the operations are more easily visible in your workflow.









Output Ports


Group Processing



Module Workflow

MRFCleaner Modules provide more detailed information on the modules in the underlying MRFCleanFactory.

This Closeddefault workflow is suitable for most situations. However, using the individual modules, it is possible to create any number of customized workflows for specific projects and/or datasets (for example, in Workbench, by using a series of consecutive MRFCleaner transformers or custom transformers). It is important, however, to understand the data being processed and the desired end result.

More Information

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.

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for samples and information about this transformer on the FME Community.

Keywords: MRFCleaner3D