The user have has to add create a surface line from waterside, channelside with ascending x-value from channel side of the embankment to till the Dike dike top at the polder side.
You can re-order the points, ascending or descending, by clicking on the table header L(enght) of Z.(height level)
You get the real order the point, as shown in the drawings, by "Ctrl + click"
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