Not official measurements, but I recently did:
Center of BB spindle to top of saddle
Used a level to get a straight line up from the center of the BB spindle and then did distance of that back to the nose of the saddle
Center of front axle to top of stem/bars straight up from it
Once stem height and saddle positioning were set, nose of saddle to tip of hoods
Verified by center of bottom bracket spindle to tip of hoods.