Resamples rasters, based on specified output dimensions, cell size in ground units, or percentage of original, by interpolating new cell values.

Jump to Configuration

Typical Uses

  • Reducing raster resolution (by reducing the number of cells and increasing cell size)
  • Coercing a raster to specific dimensions or cell (pixel) size for further processing purposes or to match other data
  • Creating thumbnail images of rasters

How does it work?

The RasterResampler accepts raster features and alters the number of rows/columns and resizes cell (pixel) size according to the parameter selections. One raster feature is output for each input feature.

Output raster resolution may be specified by set dimensions (columns and rows), cell size in ground units, or percentage of original resolution.

A variety of methods are available for output cell value interpolation.

This transformer is unaffected by raster band and palette selection.

A: Original resolution

B: Desired resolution

C: Desired resolution compared to original

D: Resampled output raster


Usage Notes

  • To resize rasters (clipping or padding) without changing the cell size, consider using the RasterSubsetter
  • To resample rasters to multiple sizes, consider using the WebMapTiler or the RasterPyramider.
  • To split rasters in multiple smaller rasters without changing the cell size, consider using the RasterTiler.
  • Although this transformer can be used to increase raster resolution, usually there is little benefit in doing so (with an exception being to match the resolution of other raster data for processing purposes).

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).


Input Ports

Output Ports


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.


Processing Behavior


Feature Holding


Dependencies None

FME Community

The FME Community is the place for demos, how-tos, articles, FAQs, and more. Get answers to your questions, learn from other users, and suggest, vote, and comment on new features.

Search for all results about the RasterResampler on the FME Community.


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