arctanhellingsgraad100
Arctanhellingsgraad100 is a term used to describe the angle obtained when converting a slope grade of 100 percent into an angle with the arctangent function. In Dutch engineering usage, hellingsgraad refers to slope expressed as a percentage, where a grade of 100 percent means a rise of 1 unit for every 1 unit of run.
The core relation is θ = arctan(grade/100), where θ is the angle in either radians or degrees depending on
In practice, arctanhellingsgraad100 and its related concept are used to translate design tolerances and safety criteria
Notes on implementation: many calculators and programming environments return the arctangent in radians by default; to