GeometryFilter
Routes a feature based on its geometry type.
Each feature that enters the transformer is output via the port corresponding to its fme type. Each output feature has a complete, unaltered copy of the source feature's attributes and geometry.
Output Ports
Each output port corresponds to standard FME Geometry Model attribute values.
Parameters
This parameter controls which output ports will appear on this transformer. Select the geometry types that are of interest, and a port will be shown for each of these. All other geometries will be output through the <Unfiltered> port.
If this parameter is set to Yes, then any heterogeneous aggregate geometries will be split into homogeneous aggregates, where each aggregate consists only of parts having the same geometry type.
If this parameter is set to Yes, any geometry instances input to the transformer will be instantiated before being filtered.
This has the same effect as placing a GeometryInstantiator transformer (with an empty XQuery) before the GeometryFilter.
Note: This parameter is disabled when Homogenize Collections is set to No. However, if you want to use that combination of modes, the GeometryInstantiator offers identical behavior.
Example
View results by routing a feature type through a GeometryFilter to an Inspector.
If you route a feature type that contains point geometry through the GeometryFilter Point output port to an Inspector, you will see only the fme_point geometry:
The Information pane in the Data Inspector shows the fme_geometry and fme_type:
Usage Notes
FME will sometimes automatically insert a GeometryFilter into a new workspace. Some destination formats only permit features of a specific geometry type to be written to a single feature type. For example, a Personal Geodatabase Feature Type (Esri Feature Class) can hold polygons or polylines, but not both.
When you read from a source dataset that permits multiple geometry types in a feature class, but write to a destination dataset that is restricted to a single geometry type per class, FME automatically creates a destination feature type for each geometry type and inserts a GeometryFilter to divide up the features on the basis of geometry. This ensures that no destination feature type receives features that it is not permitted to write.
Usage Notes
Aggregate features are not handled specifically by this transformer, as several geometries may be structured as aggregates. To filter aggregates, use the AggregateFilter.
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.
Using the Text Editor
The Text Editor provides a convenient way to construct text strings (including regular expressions) from various data sources, such as attributes, parameters, and constants, where the result is used directly inside a parameter.
Using the Arithmetic Editor
The Arithmetic Editor provides a convenient way to construct math expressions from various data sources, such as attributes, parameters, and feature functions, where the result is used directly inside a parameter.
Conditional Values
Set values depending on one or more test conditions that either pass or fail.
Parameter Condition Definition Dialog
Content
Expressions and strings can include a number of functions, characters, parameters, and more.
When setting values - whether entered directly in a parameter or constructed using one of the editors - strings and expressions containing String, Math, Date/Time or FME Feature Functions will have those functions evaluated. Therefore, the names of these functions (in the form @<function_name>) should not be used as literal string values.
These functions manipulate and format strings. | |
Special Characters |
A set of control characters is available in the Text Editor. |
Math functions are available in both editors. | |
Date/Time Functions | Date and time functions are available in the Text Editor. |
These operators are available in the Arithmetic Editor. | |
These return primarily feature-specific values. | |
FME and workspace-specific parameters may be used. | |
Creating and Modifying User Parameters | Create your own editable parameters. |
Dialog Options - Tables
Transformers with table-style parameters have additional tools for populating and manipulating values.
Row Reordering
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Enabled once you have clicked on a row item. Choices include:
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Cut, Copy, and Paste
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Enabled once you have clicked on a row item. Choices include:
Cut, copy, and paste may be used within a transformer, or between transformers. |
Filter
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Start typing a string, and the matrix will only display rows matching those characters. Searches all columns. This only affects the display of attributes within the transformer - it does not alter which attributes are output. |
Import
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Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers. |
Reset/Refresh
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Generally resets the table to its initial state, and may provide additional options to remove invalid entries. Behavior varies between transformers. |
Note: Not all tools are available in all transformers.
FME Community
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