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docs(base): note that physical water features overlap ocean tiles #580

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Alex Iannicelli (atiannicelli) merged 1 commit into from
Oct 17, 2026
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docs(base): note that physical water features overlap ocean tiles #580

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2 changes: 2 additions & 0 deletions docs/guides/base/index.mdx
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Expand Up @@ -49,6 +49,8 @@ Land use features specify the predominant human use of an area of land, for exam
#### Water
Water features represent ocean and inland water bodies. In Overture data releases, water features are sourced from OpenStreetMap. There are two main categories of water feature: ocean and inland water bodies — physical representations of inland and ocean marine surfaces, translating natural and waterway tags from OpenStreetMap.

Physical water features (`subtype = "physical"`), such as named bays, straits, and seas, overlap the ocean and inland water polygons by design. Use them for labels, and filter them out (`subtype != 'physical'`) when drawing water fills or computing water area. See the [water schema reference](/schema/reference/base/water/) for the full list of subtypes.

### Column definitions

The column definitions for every type in the base theme are generated from the schema and live in the schema reference:
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