Reparametrize UV surface

Is there any way to get UV of surface that are only on this surface? for example to avoid creating points outside surface boundary. Grasshopper allows to reparametrize surface. Do we have something similar for Dynamo? One workaround is to delete points outside surface boundary but thats not what i need.

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Seems like a rebuilt uv would need to be explicitely specified, especially with a geometry perimeter that is not 4-sided. A circlular surface boundary seems like it would qualify as such a special case. Do you have a diagram of how you envision the uv being mapped out?

I used a Geometry.Intersect node to get rid of those outside of boundary. But sure there’s a better way.