Question 1 - Structural data notation It is important to understand these different notations as you might be required to structure your data in a specific way for certain software packages or projects. Also, you might receive data using a different format to the one you are working with so will be required to convert data accordingly. Two of the primary ways of writing down planar structural data are the 'right hand rule' (RHR) and 'quadrant notation'. Using the RHR, if one places their right hand on a planar feature with their fingers pointing down dip the strike is recorded from the end of the strike line towards which the thumb points. In quadrant notation the strike is always recorded as