rdblue commented on code in PR #10981:
URL: https://github.com/apache/iceberg/pull/10981#discussion_r1941752039
##########
format/spec.md:
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@@ -1480,6 +1497,9 @@ This serialization scheme is for storing single values as
individual binary valu
| **`struct`** | Not supported
|
| **`list`** | Not supported
|
| **`map`** | Not supported
|
+| **`geometry`** | A single point, encoded as a {x, y, optional
z, optional m} concatenation of its 8-byte little-endian IEEE 754 coordinate
values, with the optional coordinates encoded as NaN if unset. |
+| **`geography`** | A single point, encoded as a {x, y, optional
z, optional m} concatenation of its 8-byte little-endian IEEE 754 coordinate
values, with the optional coordinates encoded as NaN if unset. |
Review Comment:
Sorry, I should have taken a bit more time to reply. I think we can use the
rules I suggested above and just say that if the Z dimension isn't present,
then it should be set to NaN. That way the most common cases (X,Y and X,Y,Z)
are compact.
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