st_length

Preview

This feature is in Public Preview.

Returns the length of the input geometry or geography value.

For the corresponding Databricks SQL function, see st_length function.

Syntax

Python

from pyspark.databricks.sql import functions as dbf

dbf.st_length(col=<col>)

Parameters

Parameter	Type	Description
col	pyspark.sql.Column or str	A Geography or Geometry value.

Notes

If the input is a geometry, Cartesian length is returned (in the unit of the input coordinates). If the input is a geography, length on the WGS84 spheroid is returned (expressed in meters).

Examples

Python

from pyspark.databricks.sql import functions as dbf
from pyspark.sql.functions.builtin import round
df = spark.createDataFrame([('LINESTRING(10 34,44 57,30 24)',)], ['wkt'])
df.select(round(dbf.st_length(dbf.st_geomfromtext('wkt')), 3).alias('result')).collect()

Output

[Row(result=76.896)]