huan233usc commented on PR #16765:
URL: https://github.com/apache/iceberg/pull/16765#issuecomment-4738654440

   Updated again in `ca4e1a689` to make the behavior fully explicit by default:
   
   - `GeometryType.crs84()` now serializes as `geometry(OGC:CRS84)`
   - `GeographyType.crs84()` now serializes as `geography(OGC:CRS84, spherical)`
   - bare input like `geometry` / `geography` is still accepted and resolves to 
those defaults
   - `equals` / `hashCode` still compare resolved defaults, so 
default-equivalent forms remain equal
   
   This keeps Iceberg table metadata aligned with the concrete defaults written 
into Parquet annotations and avoids depending on future default interpretation.


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