List of Supported Formats

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• About FME Rasters
  • Raster Properties
  • Band Properties
  • Palette Properties
  • Pyramiding
  • Interleaving
  • Interpretation and Data Type
  • Palette Resolution
  • Tiling and Mosaicking
  • Band Combining and Separating
  • Band and Palette Selection
  • Raster Processing
  • Raster versus Vector Features
  • Raster File Naming
  • World Files
  • TAB Files

Palette Properties

Rasters contain a set of metadata that defines the properties for each palette. These properties include:

• palette name, key, and value interpretation
• palette key and value bitdepth
• nodata key and value

Interpretation on palettes works in much the same way as it does on bands. The interpretation of a palette key must match the interpretation of the related band. Valid palette key interpretations are UInt8, UInt16, and UInt32. The palette value interpretation may be a color model such as RGB or RGBA or string data. Valid palette value interpretations are RGB24, RGBA32, RGB48, RGBA64, Gray8, Gray16, and String.

A palette does not directly store nodata values; however, since the palette keys are intended to match the band values (which can store nodata), a single palette key can be interpreted as nodata if it matched the band nodata value. This nodata key also looks up to a palette value which is then considered the nodata value. A NoData value may not exist without a nodata key.