![]() The maximum number of palette entries depends on the number of bits in the option. The values of the palettes on the input raster will not change, but the number of palette entries does change.The user can change the NoData value before writing it to the format using the nodata setter transformer. For example, a NoData value 201 will still be 201 in the output file whatever the number of bits is set to. The NoData value on the bands will not change.For example, if the number of bits is set to 4, a value of 201 (1100 1001 in base 2) will become 15 (1111 in base 2) in the output file. Note that values outside the bounds of the bit depth will be capped to the minimum or maximum. The data values on the bands will be reduced to the number of bits specified in the option.For example, to write 7-bit data, the interpretation must be one of UINT8, GRAY8, RED8, GREEN8, BLUE8, or ALPHA8. ![]() The interpretation of the input raster bands must be the minimum power of 2 above the requested bit depth. The writer checks the interpretation of the input raster bands.When a value is specified, the writer will behave as follows: ![]() The value can be set to a value between 1 and 32, or left empty. The option is exposed as a feature type parameter “Number of Bits Per Cell” on the feature type level and as a feature attribute “geotiff_number_of_bits_per_cell” on the feature level. The GeoTIFF writer has an option for setting the bit depth of the output file. Please see "About FME Rasters" for details. The GeoTIFF writer distinguishes duplicate output files by appending numbers to the filenames. Any existing files in the folder which have the same name are overwritten with the new feature data. The folder does not have to exist before the translation occurs. The names of the GeoTIFF output files written to the output dataset folder are determined from the FME Feature Type. Writer OverviewįME considers a dataset to be a folder name. Reader OverviewįME considers a single GeoTIFF file to be a dataset. GCPs (ground control points) present along with a projection in a GeoTIFF file being read can either be applied to the data as an affine transformation, or stored as properties on the raster geometry. The writer can also generate an Esri world file with the extension. The reader and writer support most GeoTIFF projections. Classified (Paletted) images will return class dictionary (palette) information associated with the band. The reader and writer support band types of Byte, UInt16, Int16, UInt32, Int32, Real32, and Real64. Each elevation sample in a raster file is a point in a single FME raster feature, while each pixel color value in an image file is a value in a single FME raster feature. GeoTIFF files can be raster files containing elevation data, or image files containing color data.
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