Knowledge Base



KB10352 - Exported TIFF image larger than TIFF source data.

There is no inherent reason why the file size of an exported TIFF image must be larger than the size of the corresponding source TIFF data. A size increase could be explained by one of the following:

  • The source image(s) are somehow compressed or less than 24 bit color, whereas the TIFF export was generated without compression or (unnecessarily) to full 24 bits. TatukGIS software supports TIFF export with LZW compression and export to 2, 4, or 8 bits, so consider these image export options.
  • ‚ÄčThe source image(s) is composed of non square (rectangular shaped) pixels. ‚ÄčIn the case of rectangular shaped pixels, the TatukGIS export operation converts these into square pixels (for maximum compatibility with other software packages). Conversion of rectangular pixels into square pixels can increase the number of pixels, resulting in an increase the export file size by up to perhaps 30%.
  • The source images used to create a mosaic are not all of the same resolution level (pixel density), forcing the export operation to apply some level of pixel resampling.
Created: September 14, 2005, Modified: September 10, 2015