[Base] Help with Ocean Water Layer - Drawing Coastlines and Adjusting Transparency

[saevioapps]

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Hi OvertureMaps Team,

I'm working with the ocean water layer from your dataset, which consists of many small polygons representing the water bodies. And, I am using Maplibre to draw the map. I have two main goals:

Draw Coastlines Only: I want to render only the coastlines from this water layer, ignoring the internal boundaries between the small polygons. Essentially, I need to create a clean outline of the land-water interface.

Adjust Ocean Transparency: I would like to display the ocean with a semi-transparent fill. However, when I do this, the lines between the small polygons become visible, creating a grid-like effect.

Could you please advise on the best approach or provide any tools/methods to achieve these visualizations?

Thank you!

Dependency with other categories, if any.

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