CoordinateSwapper

Categories

Coordinates

Geometries

Related Transformers

CoordinateConcatenator

CoordinateExtractor

Swaps coordinate axes of the input features.

Jump to Configuration

Typical Uses

  • Correcting reversed latitude and longitude coordinates

  • Producing cross-sections

  • Data QA

How does it work?

The CoordinateSwapper receives features of any geometry type, and swaps the coordinate values of two of its axes - x and y, x and z, or y and z.

This transformer does not alter attribute values - only geometry coordinate values. Features without geometry are passed through unaltered.

Examples

In this example, we have a set of GPS points in which the x and y coordinates have been incorrectly designated. Examining one point, we see that x appears to be a latitude value and y a longitude value - they should be the reverse.

The points are routed into a CoordinateSwapper.

In the parameters dialog, Swap Type is set to X <-> Y.

The output features have their x and y coordinates corrected.

Usage Notes

  • To alter coordinates stored as attribute values (not geometry), consider using the AttributeManager.

Configuration

Input Ports

Features with geometry.

Output Ports

Features with axes swapped as specified in parameters.

Parameters

Swap Type

Select which pair of coordinates to swap:

  • X <-> Y: Each feature's x-coordinates will be swapped with its y-coordinates.

  • X <-> Z: Each feature's x-coordinates will be swapped with its z-coordinates.

  • Y <-> Z: Each feature's y-coordinates will be swapped with its z-coordinates.

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.

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 CoordinateSwapper on the FME Community.

 

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