It doesn’t have everything, but maybe this will be helpful: MTB Handlebar Dimensions. My opinion is that you should try to nail down which bar you will be using while still in the design phase, then break out your measuring tools and make anatomy-driven design decisions.
PVD’s blog does contain some useful information, but the explanations often complicate relatively straightforward ideas, so I’ve found that the accompanying photos tend to be more informative than the text itself. Take a look at the photos about 1/3 of the way down here to see an approachable and systematic way to measure bars you have on hand.