Regression Line from Points

You can access this dialog from the following:

Ribbon: OpenRail Modeling > Regression > Create Regression Line split-button.

Regression Line from Points tool takes a set of points and puts them into a proper order creating a linestring (regression line). The data anticipated by this tool is typically a survey representing the centerline or rail readings. The points are seen as xy pairs. No point elevations are involved in this tool, but the points should have elevations defined if performing vertical regression analysis. If points contain elevation information, a vertical profile representing the point elevations is also added to the created regression line.

Provide the first and second points for the tool. The first data point identifies a starting point within the group of points. The second data point identifies an "adjacent" point within the group of points. These two points specify a direction (from the first identified point toward the regression line, starting from the first identified point and going towards the second. Point numbering is not important for this tool to work.

Complex Feature Definition: Used for created related Regression Complex Geometry.

Feature: Used for creating Regression line.

For the details about other dialog options (parameters) see Ordering the Points.

Note: When this tool is used, original points are converted to regression points for storing extra regression information (no new points are created). For this mechanism to work, and slew values updated properly, the points should be in the same dgn (model) as the regression work will be carried out. Points should not be coming from a reference file.

Note: This tool does not calculate existing cant values, for this Regression from Rails tool should be used.