codeant-ai-for-open-source[bot] commented on PR #38595:
URL: https://github.com/apache/superset/pull/38595#issuecomment-4045618661
## **Sequence Diagram**
This PR updates polygon data transformation to support boundary JSON where
coordinates are nested under a geometry field. The fallback prevents rows from
being dropped and allows deckgl polygon maps to render correctly for affected
datasets.
```mermaid
sequenceDiagram
participant User
participant PolygonChart
participant TransformProps
participant BoundaryJSON
participant DeckGL
User->>PolygonChart: Open polygon chart
PolygonChart->>TransformProps: Transform query rows into polygon features
TransformProps->>BoundaryJSON: Parse boundary JSON
alt Top level coordinates exist
BoundaryJSON-->>TransformProps: Return coordinates
else Nested geometry coordinates exist
BoundaryJSON-->>TransformProps: Return geometry coordinates
end
TransformProps->>DeckGL: Build polygon features
DeckGL-->>User: Render polygons on map
```
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