OpenUtilities Substation Help

Methods by Which a Curve Is Calculated

Unlike point curves, there are a number of Methods, which can be chosen from the Method option menu, for calculating the final curve that results.

Method Data points or vertices of element define
Control Points Vertices of the control polygon.
Through Points Points on the curve.
Least Squares by Tolerance and Least Squares by Number A set of points that the curve approximates or is "fit" to.
Catmull-Rom A set of points that is closely approximated.

These illustrations show the different types of B-spline curves constructed from the same line string.

B-spline curves constructed based on a line string. Method set to, from left: Control Points, Through Points, Least Squares, Catmull-Rom.