Computes intersections between all input features, breaking arcs and lines wherever an intersection occurs. A fuzzy intersection is also created from geometries which are within one of the tolerance distances, but do not actually touch or cross.
Each feature that is output through the Cleaned port will have a new attribute "mrf_clean_status" added to specify whether the feature was modified, created, or unchanged in the cleaning process. The possible values of this attribute are "Modified", "Created" and "Original".
If Intersection Action is set to Split Lines at Intersections, the input lines will be split at true intersection points into separate output lines. If it is set to Flag Intersections, then true intersection points will be output through the Flagged port as points, labels, or circles, depending on the Flag Type selected.
If selected, each group of features with the same values in the Group By attributes will be processed separately from other groups.
Note: How parallel processing works with FME: see About Parallel Processing for detailed information.
This parameter determines whether or not the transformer should perform the work across parallel processes. If it is enabled, a process will be launched for each group specified by the Group By parameter.
Parallel Processing Levels
For example, on a quad-core machine, minimal parallelism will result in two simultaneous FME processes. Extreme parallelism on an 8-core machine would result in 16 simultaneous processes.
You can experiment with this feature and view the information in the Windows Task Manager and the Workbench Log window.
Yes: This transformer will process input groups in order. Changes on the value of the Group By parameter on the input stream will trigger batch processing on the currently accumulating group. This will improve overall speed if groups are large/complex, but could cause undesired behavior if input groups are not truly ordered.
No: This is the default behavior. Processing will only occur in this transformer once all input is present.
Cleaning tolerance is used as the default tolerance unless the Feature Tolerance Attribute is specified and valid. The minimum tolerance allowed is 0.0.
The number of layers used in cleaning the data is determined by the number of different tolerance values of input features. Features that have the same tolerances are processed as being on the same layer.
If set to Split Lines at Intersections, intersections are computed between all input features, breaking arcs and lines wherever an intersection occurs. If set to Flag Intersections, the Flag Type and Flag Size parameters are enabled.
If set to Yes, a fuzzy intersection is also created from geometries which are within one of the tolerance distances, but do not actually touch or cross.
This parameter sets the flag type for true intersection points as a point, label or circle, if Intersection Action is set to Flag Intersections.
This transformer performs the same operation as the MRF2DCleaner no options selected except Compute True Intersections and/or Compute Fuzzy Intersections. See the MRF2DCleaner for more details.1Portions of this work are the intellectual property of the MRF Geosystems Corporation and are used under license. Copyright © 2006 MRF Geosystems Corporation. All rights reserved. Note that the circle/label flagging is an added option in this transformer.
FME Licensing Level
The MRFCleaner transformers are available as an extra-cost package from Safe Software. Please contact firstname.lastname@example.org or call 604-501-9985.
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.
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