What is limitation of iTIFF and iTIFF64 file format?

Hi All,

In Decartes, we usually use the raster file format iTIFF or iTIFF64. What is the difference between these two types and what is the limitation of file size for them ?

Thanks, Xue

  • Hi Xue,

    The main difference is that the iTIFF64 file format is using 64 bits addresses to keep track of the image data while 32 bits addresses are used for the old iTIFF file format.

    Thus the size of image data that a iTIFF file can store is approximatly 4GB while the iTIFF64 file format can store approximately 4 billions more image data!

    The iTIFF64 is also slighty more powerful in being able to save the geocoding information since it can use the WKT geocoding format as well as GeoTIFF geocoding format for storing geocoding information. The ITIFF file format uses only the GeoTIFF geocoding format.

    Thanks,

    Mathieu



  • This is just what I want to know. Thanks Mathieu very much!

  • Hi Mathieu,

    A further question: Is the iTIFF64 format defined by Bentley? I can not find more info about this from internet. If this is true, how to create an iTIFF64 file ? Could you show me a sample iTIFF64 file which uses WKT format?

    Thanks again !   Xue

  • Hi Xue,

    Yes the iTIFF64 file format is defined by Bentley (i.e. : Bentley private format). To create an iTIFF64 file you just have to attach a raster in Raster Manager, select it, click on Save As... and select Internet TIFF64 [*.iTIFF64] in Save as type combo box. A better solution if you have many raster files to convert would be to use the Batch Convert functionality (Raster Manager->File->Batch Convert).

    Why would you like to have a sample iTIFF64 file using the WKT format?

    Thanks,

    Mathieu



  • Apologize for not signing in this great web a long time. Thanks Mathieu again.

    Why would you like to have a sample iTIFF64 file using the WKT format?

    Because I would like to know more about WKT. You have tell me "The iTIFF64 is also slighty more powerful in being able to save the geocoding information since it can use the WKT geocoding format as well as GeoTIFF geocoding format for storing geocoding information. " in your previous post.