st_dimension

Belangrijk

Deze functie bevindt zich in openbare preview-versie.

Berekent de topologische dimensie van de 2D-projectie van de invoergeometrie.

Voor de overeenkomstige Databricks SQL-functie, zie de st_dimension functie.

Syntaxis

from pyspark.databricks.sql import functions as dbf

dbf.st_dimension(col=<col>)

Parameterwaarden

Kenmerk	Typologie	Description
col	pyspark.sql.Column of str	Een geometriewaarde.

Voorbeelden

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()

[Row(result=0)]

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()

[Row(result=1)]

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()

[Row(result=2)]

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()

[Row(result=0)]