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RasterRotationApplier

Applies the raster rotation angle on the input raster properties to the rest of the raster properties and data values.

The expected input is a raster with a non-zero rotation angle and the expected output is a rotated raster with a rotation angle of 0.0.  It is expected that the input raster properties will be modified to conform the output raster properties for a raster rotated by the given angle.

Applying a rotation angle is primarily done for compatibility with other processing and writers that cannot handle a rotation angle.

Parameters

ClosedInterpolation Type

Cell values are interpolated in order to change the raster to the specified sizes.

Interpolation methods:

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

Usage Notes

  • This transformer is unaffected by raster band and palette selection.
  • It is suggested that the input raster also contain a nodata value since applying the rotation often has the effect of adding nodata areas around the corners of the rotated raster. These nodata areas will be filled with 0 or black values in the absence of an input raster nodata value.

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.

Transformer Categories

Rasters

FME Licensing Level

FME Professional edition and above

Technical History

Associated FME function or factory: @ApplyRasterRotation 

 

 

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Tags Keywords: raster grid band channel rotate rotation apply "nearest neighbor" "nearest neighbour" bilinear bicubic average interpolate