CoordinateSystemDescriptionConverter

Categories

Coordinates

Geometries

Converts coordinate systems between FME and AutoDesk WKT, EPSG, Esri WKT, MapInfo, OGC WKT, Oracle SRID, and PROJ.4 representations.

If, for example, you are converting from Esri Shapefile to Oracle Spatial, in addition to converting the data, FME also converts the coordinate system metadata from the Esri representation to the Oracle representation. This transformer allows you to do this manually.

The attribute that contains the source coordinate system.

  • Convert from FME Representation: Set the Representation parameter to the coordinate system type that you want to use to format the output field.
  • Convert to FME Representation: Set the Representation parameter to select the coordinate system format to use when interpreting the input field.
  • Autodesk Well Known Text (WKT)
  • EPSG number
  • Esri Well Known Text (WKT)
  • MapInfo String
  • OGC Well Known Text (WKT)
  • Oracle SRID number
  • PROJ.4 string

This is the attribute that will contain the results. The default name is_newcoordsys.

Usage Notes

You should use this transformer only in rare instances, much like theReprojector. Instead, you should use the workspace Navigator view to set the source and destination coordinate systems for the translation.

This transformer can be used in conjunction with theCoordinateSystemFetcherandCoordinateSystemSetterto use externally defined coordinate systems with FME features within the transformation environment.

Editing Transformer Parameters

使用一组菜单选项,变压器参数s 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, clickbeside the applicable parameter. For more information, see变压器参数菜单选项.

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.

进口

 进口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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Search for samples and information about this transformer on theFME Community.