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Important
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
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
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()
[Row(result=76.896)]