Use this dialog box to specify a range of chainages within a profile from which to sample data for a best fit element regression.
Specifies the beginning chainage of the range from which to take the sample. To edit the start chainage, enter a value or click to select a location on the profile.
Specifies the ending chainage of the range from which to take the sample. To edit the end chainage, enter a value or click to select a location on the profile.