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Adgang til denne side kræver godkendelse. Du kan prøve at ændre mapper.
Important
This feature is in Public Preview. You can confirm preview enrollment on the Previews page. See Manage Azure Databricks previews.
Returns the M coordinate of the input point geometry, or None if the input point geometry is empty or if it does not have an M coordinate.
For the corresponding Databricks SQL function, see st_m function.
Syntax
from pyspark.databricks.sql import functions as dbf
dbf.st_m(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([('POINT M (1 2 4)',)], ['wkt'])
df.select(dbf.st_m(dbf.st_geomfromtext('wkt')).alias('result')).collect()
[Row(result=4.0)]
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('POINT ZM (1 2 3 4)',)], ['wkt'])
df.select(dbf.st_m(dbf.st_geomfromtext('wkt')).alias('result')).collect()
[Row(result=4.0)]