RasterBandPropertyExtractor

Extracts the band and palette properties of a raster feature and adds them to a list attribute.

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Typical Uses

  • Extracting band and palette information from raster features

How does it work?

The RasterBandPropertyExtractor receives raster features, and extracts any existing band and palette properties. The results are added to a new list attribute (because a raster may have multiple bands), and output with the original feature.

The transformer has no parameters.

Property attributes include:

_band{}.band_name
_band{}.band_interpretation
_band{}.band_bit_depth
_band{}.band_interleaving
_band{}.band_num_tile_rows
_band{}.band_num_tile_columns
_band{}.band_nodata
_band{}.band_num_palettes
_band{}.palette{}.palette_name
_band{}.palette{}.palette_key_interpretation
_band{}.palette{}.palette_value_interpretation
_band{}.palette{}.palette_bit_depth

Wherever "{}" appears, there will be one instance of the attribute for each band or palette. The first will appear with {0}, the second with {1}, and so on.

If a raster band has no palettes, _band{}.band_num_palettes will be zero (0), and no further palette attributes will be added.

This transformer is unaffected by raster band and palette selection.

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 combing 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.

Reference

Processing Behavior

Feature-Based

Feature Holding

No

Dependencies None
FME Licensing Level FME Professional Edition and above
Aliases RasterBandPropertiesExtractor
History  
Categories

Calculated Values

Rasters

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Examples may contain information licensed under the Open Government Licence – Vancouver