BigTIFF

Overview
BigTIFF is a TIFF-like image file format, which supports larger files and data structures than does TIFF. It is logically almost identical to TIFF, though it is not compatible with it.

Identification
Files begin with  (little-endian BigTIFF), or   (big-endian BigTIFF).

Software

 * , starting with version 4.
 * Fork of libtiff, apparently unofficial fork of libtiff which originated with Aperio, now part of Leica Biosystems.

Sample files

 * ftp://ftp.graphicsmagick.org/pub/tiff-samples/
 * http://awaresystems.be/imaging/tiff/bigtiff/BigTIFFSamples.zip