Scaler

Scales x, y, and/or z coordinate values to resize geometry.

Typical Uses

Scaling z values for emphasis or de-emphasis
Scaling z values when vertical and horizontal units are mismatched
Georeferencing
Sizing objects or labels
Mirroring objects
Changing units

How does it work?

The Scaler receives features with any type of geometry and applies a multiplier to their coordinates, resizing the features relative to either their center or the origin of their coordinate system.

X, y and/or z coordinates are multiplied by the provided X, Y, and Z Scale Factors. A scale factor of one (1) implies no change to a coordinate.

The origin for scaling may be either 0,0 in the feature’s own coordinate system, or the center of the feature itself.

When using the 0,0 origin, if the object being scaled is not on or near the 0,0 point of the coordinate system (as is usually the case with georeferenced data), using the Scaler will also introduce a shift.

When using the Center Point origin, each individual feature will be scaled around its own center, not the center of the dataset’s extents.

Additional parameters are provided for type-specific scaling, including text, raster, and point cloud. This transformer supports raster band and palette selection. The RasterSelector can be used to modify selection.

Examples

Usage Notes

The Aggregator and Deaggregator may be useful for scaling around a dataset’s center.
Reprojecting to a local coordinate system may also be useful - see the CommonLocalReprojector and Reprojector (to local coordinate systems).

Configuration

Input Ports

Output Ports

Parameters

General

X Scale Factor	Provide a multiplier for the feature’s x coordinates. Values may be entered directly or provided via an attribute, expression, user parameters, or conditional value.
Y Scale Factor	Provide a multiplier for the feature’s y coordinates. Values may be entered directly or provided via an attribute, expression, user parameters, or conditional value.
Z Scale Factor	Provide a multiplier for the feature’s z coordinates. Values may be entered directly or provided via an attribute, expression, user parameters, or conditional value. This parameter has no effect on two-dimensional vector features. On rasters, the multiplier is applied to the cell values of all selected bands.
Scale Origin	Select a scaling direction. Coordinates may be scaled relative to: 0,0: the origin of the feature’s coordinate system. This can produce large positional shifts unless the feature is in a local coordinate system. For rasters, only the X and Y Scale Factors will cause location coordinate shifts. Center Point: scaling will be done omnidirectionally relative to the center point of the feature, and the center point will be unchanged.

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.

How to Set Parameter Values

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

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

Table Tools

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.

Reference

Processing Behavior	Feature-Based
Feature Holding	No
Dependencies	None
Aliases
History

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 all results about the Scaler on the FME Community.

Examples may contain information licensed under the Open Government Licence – Vancouver and/or the Open Government Licence – Canada.