Inspecting the Allen Institute SDK and data, from The Virtual Brain Project perspective.
Usefull links from Allen:
http://www.nature.com/nature/journal/v508/n7495/full/nature13186.html http://alleninstitute.github.io/AllenSDK/_static/examples/nb/mouse_connectivity.html http://help.brain-map.org/display/mouseconnectivity/Projection
Links from TVB:
http://docs.thevirtualbrain.org/manuals/UserGuide/Complete_Dataset_Description.html