RasterBandNodataRemover

Removes the existing nodata identifier from selected bands of a raster feature. Any values previously equal to the nodata value are considered valid data.

Jump to Configuration

Typical Uses

  • Making cells containing the nodata value valid for calculations.
  • Making nodata cells visible in a visualization tool that otherwise renders them transparently.

How does it work?

The RasterBandNodataRemover receives raster features, and removes the nodata property from any selected bands. It does not alter cell values.

Cells that have the current nodata value retain their values, and those values become valid for operations such as expression evaluation and statistical analysis.

Nodata represents an absence of data, and cells that have the nodata value are ignored for most calculations, and are transparent when viewed in the FME Data Inspector and many other visualization tools.

If the raster does not have a nodata property defined, it will be unaffected by this transformer.

To select specific bands, use the RasterSelector prior to the RasterBandNodataRemover.

This transformer supports raster band selection. Palettes are unaffected.

Examples

Usage Notes

Choosing a Raster Transformer

FME has an extensive selection of transformers for working with raster data. They can be generally categorized as working with whole rasters, bands, cells or palettes, and those designed for workflow control or combining raster with vector data.

For information on raster geometry and properties, see Rasters (IFMERaster).

Configuration

Input Ports

Output Ports

Parameters

This transformer has no parameters.

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.

Dialog Options - Tables

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

Reference

Processing Behavior

Feature-Based

Feature Holding

No

Dependencies None
FME Licensing Level FME Professional Edition and above
Aliases RasterNodataRemover
History  

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