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Important
This feature is in Public Preview.
Returns the maximum Z coordinate of the input geometry, or None if the input geometry is empty or does not contain Z coordinates.
For the corresponding Databricks SQL function, see st_zmax function.
Syntax
from pyspark.databricks.sql import functions as dbf
dbf.st_zmax(col=<col>)
Parameters
| Parameter | Type | Description |
|---|---|---|
col |
pyspark.sql.Column or str |
A Geometry value. |
Examples
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('LINESTRING Z (1 2 3,4 5 6,7 8 9)',)], ['wkt'])
df.select(dbf.st_zmax(dbf.st_geomfromtext('wkt')).alias('result')).collect()
[Row(result=9.0)]
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('POLYGON Z ((2 0 1,1 2 0,-1 -1 2,0 -1 1, 2 0 1))',)], ['wkt'])
df.select(dbf.st_zmax(dbf.st_geomfromtext('wkt')).alias('result')).collect()
[Row(result=2.0)]