st_dimension
Renvoie la dimension topologique de la projection 2D de la géométrie d'entrée.
Pour la fonction Databricks SQL correspondante, consultez la fonctionst_dimension.
Syntaxe
Python
from pyspark.databricks.sql import functions as dbf
dbf.st_dimension(col=<col>)
parameter
parameter | Type | Description |
|---|---|---|
|
| Une valeur de géométrie. |
Exemples
Python
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('MULTIPOINT(EMPTY,-1 0,EMPTY)',)], ['wkt'])
df.select(dbf.st_dimension(dbf.st_geomfromtext('wkt', 4326)).alias('result')).collect()
Output
[Row(result=0)]
Python
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('LINESTRING(-1 0,0 -1,1 0,0 1,-1 0)',)], ['wkt'])
df.select(dbf.st_dimension(dbf.st_geomfromtext('wkt')).alias('result')).collect()
Output
[Row(result=1)]
Python
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([('MULTIPOLYGON(EMPTY,((-1 0,0 -1,1 0,0 1,-1 0)))',)], ['wkt'])
df.select(dbf.st_dimension(dbf.st_geomfromtext('wkt')).alias('result')).collect()
Output
[Row(result=2)]
Python
from pyspark.databricks.sql import functions as dbf
from pyspark.sql.functions import unhex
df = spark.createDataFrame([('0107000020e610000000000000',)], ['ewkb'])
df.select(dbf.st_dimension(dbf.st_geomfromewkb(unhex('ewkb'))).alias('result')).collect()
Output
[Row(result=0)]