Kengo Seki created SEDONA-145:
---------------------------------
Summary: Fix ST_AsEWKT to reserve the Z coordinate
Key: SEDONA-145
URL: https://issues.apache.org/jira/browse/SEDONA-145
Project: Apache Sedona
Issue Type: Improvement
Reporter: Kengo Seki
Currently, ST_AsEWKT drops the Z coordinate, while ST_AsText reserves it.
{code}
scala> spark.sql("SELECT ST_AsText(ST_Point(0.0, 0.0, 0.0))").show()
+----------------------------------+
|st_astext(st_point(0.0, 0.0, 0.0))|
+----------------------------------+
| POINT Z(0 0 0)|
+----------------------------------+
scala> spark.sql("SELECT ST_AsEWKT(ST_Point(0.0, 0.0, 0.0))").show()
+----------------------------------+
|st_asewkt(st_point(0.0, 0.0, 0.0))|
+----------------------------------+
| POINT (0 0)|
+----------------------------------+
{code}
As far as I can see, Sedona's 3D support is limited as of now, but a few
functions (e.g., ST_3DDistance) support it, so the Z coordinate should be
reserved.
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