EsriReprojector

Click the Browse button to select from the available Esri coordinate systems. In the selection dialog, you can filter by name or wkid, import a coordinate system, and view coordinate system details.

You can also select an attribute whose value contains Esri WKT. The attribute value must be of the form “ESRIWKT|<name>|<esriwkt>” where “<name>” is the coordinate system name, and “<esriwkt>” is the WKT representing the coordinate system.

Click the Browse button to select from the available Esri coordinate systems. In the selection dialog, you can filter by name or wkid, import a coordinate system, and view coordinate system details.

You can also select an attribute whose value contains Esri WKT. The attribute value must be of the form “ESRIWKT|<name>|<esriwkt>” where “<name>” is the coordinate system name, and “<esriwkt>” is the WKT representing the coordinate system.

A geographic transformation converts data between two geographic coordinate systems. If both the source and destination coordinate systems have been provided, then a list of valid transformations will be provided in the pull down menu. Selecting a transformation from the pull down menu will simultaneously set the Geographic Transformation Direction to the appropriate direction.

Click here to see a PDF of valid geographic transformation names for this parameter. Names of custom (user created) geographic transformations may also be used.

Note: The geographic transformation name is case-sensitive. If you do not enter the parameter in the correct case, FME will fail and produce an error saying it cannot locate the transformation parameter.

Note: Some geographic transformations require transformation grid files that are not present in ArcGIS by default. If such a transformation is chosen, no error will occur, and no geographic transformation will be applied to the features. Examples of installing additional grid shift files in ArcGIS can be found here.

You can also enter GEOGTRAN Well Known Text that represents a geographic transformation.

Note: To use this feature, you must have an Esri CustomTransformations folder. ArcGIS Desktop installations automatically create this folder. The CustomTransformations path is specific to the ArcGIS version and type (Server, Desktop, etc.).
ArcGIS 10.0 Example:
%APPDATA%\ESRI\Server10.0\ArcToolbox\CustomTransformations
ArcGIS 9.3.1 Example:
%APPDATA%\ESRI\ArcToolbox\CustomTransformations

This is the transformation direction (either "forward" or "reverse").

The Interpolation Type affects only raster data. Cell values are interpolated in order to change the raster to the specified size.

• Nearest Neighbor is the fastest but produces the poorest image quality.
• Bilinear provides a reasonable balance of speed and quality.
• Bicubic is the slowest but produces the best image quality.
• Average 4 and Average 16 have a performance similar to Bilinear and are useful for numeric rasters such as DEMs.

The Cell Size applies only to raster features.

• Stretch Cells: The cell size of the raster will be adjusted to maintain the same number of rows and columns in the reprojected raster as there were in the input raster.
• Square Cells: The number of rows and columns as well as the spacing will be changed to maintain approximately the same cell ground area and form square cells where the horizontal and vertical cell sizes are equal.
• Preserve Cells: Like the Square Cells option, this option will change both the number of rows and columns and the spacing to maintain cell ground area, but will also try to preserve the original cell aspect ratio, taking into account any warping caused by the reprojection.

Sets the tolerance, in cells, for approximating cell locations for raster reprojection.

If a value of 0.0 is specified, every cell location in the raster will be reprojected. This is the default.

If a value > 0.0 is specified, rather than reprojecting every single cell location in the raster, some cell locations will be approximated. The difference between an approximated cell location and the true cell location should be at most the tolerance value. For example, if a value of 0.5 is specified, each approximated cell location should be at most half a pixel away from its true location. Specifying a value > 0.0 may improve performance.

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.

Note: Not all tools are available in all transformers.