GeoTIFF Writer: Feature Type Parameters

To access feature type parameters, click the gear icon on a feature type in the workspace. This opens the Feature Type Parameter Editor.

Tip: To always display the editor in Workbench, you can select View > Windows > Parameter Editor.

General

All feature types share similar General parameters, which may include Feature Type Name, Reader or Writer information, and Geometry.

In most Writer Feature Type parameter dialogs, you can also control Dynamic Schema Definitions. Some database formats accept a Table Qualifier prefix on the output table feature type.

Raster Settings

World files are used to store georeferencing information for rasters. More specifically, they describe the origin, spacing, and rotation of a raster.

When this parameter is set to Yes, the workspace generates a world file with the same prefix as the output filename, but with the suffix .wld.

Enables or disables the generation of a TAB file along with the output image.

Compression

This option sets the compression to use.

This option sets the desired compression level of the output image. This is expressed as a percentage of the original file size. For example, setting a compression level of 75 means that the output image will be approximately 75% smaller (one-quarter of the size) than an uncompressed image.

Note that this value only represents the targeted compression level, and this may not actually be achieved. JPEG supports both lossy and lossless compression. With lossy compression, the compressed image is an approximation of the original. With lossless compression, the compressed image is identical to the original.

Note: Repeatedly reading and saving files may decrease the quality for this format. In addition, Workbench may not know which format data comes from, and whether it used lossy compression. If you know that source data comes from files with lossy compression, you should also set the compression level to 0. Although this compression still does not guarantee the exact copy of the source file, the output will be very close to the original.

Tile

This option specifies whether to create tiled or stripped TIFF files.

These options specify the size of tiles to create.

Specifies the number of columns and rows in a tile. This option only applies when creating a tiled file: strips are required to be the full width of the raster.

This value is required to be a multiple of 16.

Note that other options may impact this value:

  • If creating a tiled file, this value must be a multiple of 16.
  • If applying JPEG compression, this value must be a multiple of 8.
  • If applying JPEG compression with a photometric interpretation of YCbCr, this must be a multiple of 16.

Generate Pyramids

The number of pyramid levels to generate. This setting does not include the original resolution image. Each pyramid level has half the number of rows and columns of the previous level.

The interpolation method used to reduce the image size.

  • Nearest Neighbor is the fastest but produces the poorest image quality.
  • Bilinear provides a reasonable intermediate option.
  • Bicubic is the slowest but produces the best image quality.

The tile size used in the reduced-resolution images.

Advanced

The byte order used in the file. When writing, valid values are MSB, LSB, and machine (meaning the native byte order of the machine running FME).

Specifies whether the writer should calculate the MinSampleValue and MaxSampleValue TIFF tags values from the input raster.

Calculating the min/max values may increase translation time. Note that if this is set to Yes, the calculated values will override any explicit values specified for geotiff_tifftag_minsamplevalue and geotiff_tifftag_maxsamplevalue.

Enabling this option allows an output GEOTIFF file larger than 4GB.

Interleaving refers to the storage of multicomponent interpretations and the order in which the individual cell values are stored together. Bands in FME use Band Sequential (BSQ) interleaving indicating that they are all stored uniquely. Palettes in FME are Band Interleaved by Pixel (BIP) as each palette value is stored together with each key in the palette.

BIP may be less efficient for reading and writing by FME, but is more widely supported by other applications. If not specified, the default interleaving is BSQ.

Note: This option corresponds to the PlanarConfiguration TIFF tag. BIP corresponds to a value of 1 (Chunky), and BSQ corresponds to a value of 2 (Planar).

This option allows writing datasets with any bit depth between 1 and 32.

The color space of the image data. The available options are:

  • Auto: The photometric interpretation will be implicitly determined from the FME interpretation.
  • MinIsBlack: The minimum value of the raster should be displayed as black. This option only applies to numeric rasters.
  • MinIsWhite: The minimum value of the raster should be displayed as white. This option only applies to numeric rasters.
  • YCbCr: The values should be stored using the YCbCr color space. This option is only valid when using JPEG compression.

See the section Feature Representation for additional information.