st_zmax

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)]