Offsetter

Categories

3D

Spatial Analysis

Adds offsets to the feature's coordinates.

After you connect the transformer, you can enter parameter values as a number or pick the value of a feature attribute by picking Set to Attribute Value from the Parameter menu.

The feature will be shifted by the amounts specified.

This transformer works with both raster and vector data.

This transformer supports raster band and palette selection. The RasterSelector can be used to modify selection.

Examples

This example shows an image offset using the X Offset and Y Offset parameters:

Configuration

Output Ports

The dynamic <Rejected> port appears when a parameter is set to a non-literal value that might make processing impossible.

For example, if a numeric parameter such as Line Width, Count Start, or Decimal Places is set to an expression, attribute value, or user parameter, it is possible to pass in a non-numeric value that cannot be used. Decimal Places = Cat cannot be processed, so the feature will be output via this port.

Rejected features will have an fme_rejection_code attribute explaining the reason for rejection.

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.

Parameters

Mode

The mode in which to offset feature coordinates.

Cartesian Coordinates

X Offset, Y Offset, and Z Offset

A separate offset must be set for each of the X, Y, and Z axes. If the input feature is 2D and a Z offset is specified, the feature is converted to 3D, and the Z offset is applied from a starting Z value of zero. If the input feature is a raster, only X and Y offset values will cause coordinate location shifts. The Z offset will cause the values in the cells of the raster to be offset by the specified amount for each selected band.

Polar Coordinates

Distance

The distance to offset the feature.

Polar Angle

Angle in degrees CCW from the positive X-axis.

Spherical Coordinates

Distance

The distance to offset the feature.

Azimuth

Angle in degrees CW from the positive Y-axis.

Altitude

Angle in degrees from the XY plane. The angle between the XY plane and the positive Z-axis is 90 degrees.

Component

Specifies a component to offset on point cloud features. Note that the x, y, and z components can be offset using the X Offset, Y Offset, and Z Offset parameters. This parameter is intended for non-spatial components (for example, intensity).

If the same component occurs multiple times in the table, each of the Offset values will be added to that component's value.

Offset

The offset that will be applied to the corresponding point cloud component.

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.

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.

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.

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.

FME Community

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Keywords: raster vector coordinates offset pointcloud