I'm hoping someone here can help me out or point me in the right direction? I have a drawing that shows a linear measurement from one surface to the intersection of two angled surfaces. There is a radius where the two angled surfaces meet. We are currently having a debate in our lab on whether or not the linear measurement is to the center of the radius or to the theoretical intersection of the two surfaces. I'm trying to find an ISO standard for this but I'm not having any luck. I have seen it done both ways in the past but in this instance I'm reasonably sure that the dimension is to the theoretical intersection. Does anyone have any suggestions on where I could find a standard for this? I'm guessing there has to be an ISO standard or DIN spec somewhere but I'm not even sure where to start on this one? Thanks.