Remove viewing group layer `6 - Chart scale boundaries` and viewing group `21030 - Chart scale boundary, overscale data [AP(OVERSC01)]`?

[DavidGrant-NIWC]

@alvarosanuy, @TomRichardson6: Should the subject items be removed?

The scale boundaries and area pattern are added by the OEM/ECDIS. The subject viewing group is never output by any rule in the portrayal catalog.

OTOH, leaving them in provides a machine-readable mechanism to control the visibility of this manufacturer added information.

[TomRichardson6]

@DavidGrant-NIWC my initial reaction here is that we should retain them for now and seek feedback from implementers.

Could we raise an issue in the Portrayal Sub Group @alvarosanuy to seek OEM input on this question?

[DavidGrant-NIWC]

Retained pending PSWG guidance.