Section 7.3 for Sag Charts
Rather than have Lines be an array of strings, why not do like:
"Lines": [ { "Base": 6, "Add": 1, "Radius": 15, "Angle": 0, "Sag": 3.17 }, { "Base": 6.00, "Add": 1.00, "Radius": 15.00, "Angle": 15, "Sag": 3.56 }, ... ]
No need to multiply by 100 and naming the values gives more clarity.