ST_Is3D

ST_Is3D takes a geometry column and returns a boolean column. The function returns True if the geometry is three-dimensional; otherwise, it returns False. The geometry is considered three-dimensional if it has x,y,z coordinates.

For more details, go to the GeoAnalytics Engine API reference for is_3d.

This function implements the OpenGIS Simple Features Implementation Specification for SQL 1.2.1

Examples

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from geoanalytics.sql import functions as ST, Point

data = [
    (Point(10,12,4), ),
    (Point(10,12), )
]

df = spark.createDataFrame(data, ["point"])

df.select(ST.is_3d("point").alias("is_3d")).show()

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+-----+
|is_3d|
+-----+
| true|
|false|
+-----+

Version table

Related topics

• SQL functions
• Data sources
• Coordinate systems and transformations