This dataset is a 3D mutichannel image which is derived from the original data introduced by the Allen Mouse Common Coordinate Framework v3 (http://help.brain-map.org/download/attachments/2818171/MouseCCF.pdf). The image file format is a xml/hdf5 file used by ImageJ/Fiji's bigdataviewer (https://docs.openmicroscopy.org/bio-formats/6.1.0/formats/big-data-viewer.html). All channels are isotropically sampled with a voxel size of 10 micrometers. Channels: 0: NISSL (http://download.alleninstitute.org/informatics-archive/current-release/mouse_ccf/ara_nissl/ara_nissl_10.nrrd) 1: LABELS Border - Delimits the borders of the labels 2: ARA 3: LABELS Mod 65000 : Labels modulo 65000. The labels modulo 65000 channel is used because the xml/hdf5 file format handles only 16-bits images, while the reference atlas has (sparse) values above 65535. There is no overlap of labels after computing the label value mod 65000. Thus no loss of information in the mod labels channels. The related ontology from the allen brain (file 1.json) is also stored here for recovery safety.