GeometryPropertyExtractor

Input

Features with geometries.

Extracted

Features with newly set attributes based on geometry label or traits.

Unmatched

Features that were not queried.

Features with no geometry properties are output through this port along with an additional attribute, fme_rejection_code, indicating the reason for rejection - MISSING_GEOMETRY_PROPERTY.

Rejected Feature Handling: can be set to either terminate the translation or continue running when it encounters a rejected feature. This setting is available both as a default FME option and as a workspace parameter.

General

Property to Extract

Traits: Extract the selected traits to attributes of the same name.
Geometry Label: Extract the geometry label to the specified attribute

Geometry Part Selection XQuery

Use this parameter to isolate only a portion of the input geometry.

If no criteria are specified, the action will apply to the entire geometry at all levels.

Selection can be based on structural location, geometry label, type, appearance information, traits, trait storage types, or definition reference. The syntax used is a restricted set of XQuery, where the return clause is fixed.

The basic Geometry XQuery dialog allows you to construct simple selection queries by automatically writing the necessary query based on specified test clauses. Clicking the Switch to Advanced button opens the Advanced Editor, which allows you to type a query free-form, for more expressive queries.

Note Once you switch to Advanced mode, you will have to clear all parameters before you can return to Basic mode.

A hierarchical geometry is represented as nodes of type geometry, with attributes containing information about traits, type, and label for each geometry.

Extract Traits

Prefix Extracted Trait with Geometry Label

Setting this parameter to Yes will prefix the extracted traits with the respective geometry’s label. If traits with the same name exist on multiple geometries, using this option will allow these traits to exist independently.

Traits to Extract & Extract Traits as List

The names of traits to extract from the geometry. If the Extract Traits as List checkbox is active, then the traits will be pushed up as a list attribute of the same name (even if just one trait present). If the Extract Traits as List checkbox is not active, then the trait will be set as an attribute, and if the trait is present on multiple parts of the geometry, one of the values will arbitrarily be the value associated with the new attribute. If no traits are specified, all traits on selected geometries will be pushed up as attributes (creating a list if the trait is present on multiple parts of the geometry and not otherwise).

Output Attribute Name

Geometry Label

Name the attribute to contain the geometry label.

If a hierarchical geometry is present, multiple geometry labels will be extracted onto a list attribute of the same name. The default value for the Geometry Label Attribute is _geometry_label.

This parameter is valid when the Property to Extract is set to Geometry Label.

How to Set Parameter Values

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.

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.

Text Editor

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.

Arithmetic Editor

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.

Content Types

String Functions	These functions manipulate and format strings.
Special Characters	A set of control characters is available in the Text Editor.
Math Functions	Math functions are available in both editors.
Date/Time Functions	Date and time functions are available in the Text Editor.
Math Operators	These operators are available in the Arithmetic Editor.
FME Feature Functions	These return primarily feature-specific values.
FME Parameters	FME and workspace-specific parameters may be used.
Creating and Modifying User Parameters	Create your own editable parameters.

Dialog Options - Tables

Table Tools

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

Row Reordering

Enabled once you have clicked on a row item. Choices include:

Add a row
Remove a row
Move current row up one
Move current row down one
Move current row to top
Move current row to bottom

Cut, Copy, and Paste

Enabled once you have clicked on a row item. Choices include:

Cut a row - delete and copy to clipboard
Copy a row to the clipboard
Paste a row from the clipboard

Cut, copy, and paste may be used within a transformer, or between transformers.

Filter

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

Import populates the table with a set of new attributes read from a dataset. Specific application varies between transformers.

Reset/Refresh

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.

Processing Behavior	Feature-Based
Feature Holding	No
Dependencies	None
Aliases	GeometryTraitExtractor GeometryTraitFetcher GeometryLabelExtractor
History

GeometryPropertyExtractor

Configuration

Input Ports

Output Ports

Parameters

Editing Transformer Parameters

Reference

FME Online Resources