Channels

For further explanation of the reasons why the mapping may seem inconsistent, see the section describing the assumed default profile orientations in the file and Cardinal Points locations and Structural Design. In particular your attention is drawn to the different handedness of the coordinate systems as illustrated below.

The main differences arise from the mapping of the profile orientations in the Catalogue onto the agreed format. The difference is most apparent in channel and angle profiles. The diagram below illustrates the mappings of the Plines to Cardinal Points.

Note:
The different Y directions to match the default angle orientations in each system.

If you want to create profiles, you must provide a Pline set similar to the ones provided here to map onto the Cardinal Point Pline set. If they are named differently, there must be a mapping to Cardinal Points as shown above. Further, you may have to manage the orientation of the profile with regard to the intermediate arrangement by using the Profile Orientation mapping file (External Mapping Files).