st_dimensão

Importante

Este recurso está no Public Preview.

Devolve a dimensão topológica da projeção 2D da geometria de entrada.

Para a função SQL do Databricks correspondente, veja st_dimension função.

Sintaxe

from pyspark.databricks.sql import functions as dbf

dbf.st_dimension(col=<col>)

Parâmetros

Parâmetro	Tipo	Description
col	pyspark.sql.Column ou str	Um valor de Geometria.

Examples

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)]