szehon-ho commented on code in PR #10981:
URL: https://github.com/apache/iceberg/pull/10981#discussion_r1772045484


##########
format/spec.md:
##########
@@ -1312,7 +1325,7 @@ This serialization scheme is for storing single values as 
individual binary valu
 | **`struct`**       | **`JSON object by field ID`**             | `{"1": 1, 
"2": "bar"}`                     | Stores struct fields using the field ID as 
the JSON field name; field values are stored using this JSON single-value 
format |
 | **`list`**         | **`JSON array of values`**                | `[1, 2, 3]` 
                               | Stores a JSON array of values that are 
serialized using this JSON single-value format |
 | **`map`**          | **`JSON object of key and value arrays`** | `{ "keys": 
["a", "b"], "values": [1, 2] }` | Stores arrays of keys and values; individual 
keys and values are serialized using this JSON single-value format |
-
+| **`geometry`**     | **`JSON string`**                         
|`00000000013FF00000000000003FF0000000000000`| Stores WKB as a hexideciamal 
string, see [Appendix G](#appendix-g-geospatial-notes)                          
                                                                                
                                                                                
                            |

Review Comment:
   @rdblue am not entirely sure where this part of the spec is used.  Should it 
also match the above (the more optimized serialization for stats)?



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