RasterPropertyExtractor

Extracts the geometry properties of a raster feature and exposes them as attributes.

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Typical Uses

  • Extracting basic information about a raster feature, such as geographic extents and origin point, cell spacing, number of bands, and more.

How does it work?

The RasterPropertyExtractor receives raster features, and extracts basic information about their geometry. The results are added as attributes, and output with the original feature.

The transformer has no parameters.

Property attributes include:

_num_bands

_num_rows

_num_columns

_spacing_x

_spacing_y

_origin_x

_origin_y

_rotation_x

_rotation_y

_min_x

_min_y

_max_x

_max_y

_cell_origin_x

_cell_origin_y

_upper_left_x

_upper_left_y

_upper_right_x

_upper_right_y

_lower_right_x

_lower_right_y

_lower_left_x_lower_left_y

This transformer is unaffected by raster band and palette selection.

Examples

Usage Notes

  • This transformer extracts only raster geometry properties. To extract band and palette properties, such as band names, interpretation types, and palette information, use the RasterBandPropertyExtractor.

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

Note: Feature order may change in relation to other output ports. Feature order per port is maintained.

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 RasterPropertiesExtractor
History  

FME Community

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