ST_StartPoint takes a linestring column and returns a point column. The point column represents the first point of the input linestring.
| Function | Syntax |
|---|---|
| Python | start |
| SQL | ST |
| Scala | start |
For more details, go to the GeoAnalytics Engine API reference for start_point.
This function implements the OpenGIS Simple Features Implementation Specification for SQL 1.2.1.
Examples
from geoanalytics.sql import functions as ST, Linestring
df = spark.createDataFrame([(Linestring([[[5,5],[7,6],[6,6],[4,2]]]),)], ["linestring"])
df.select(ST.start_point("linestring").alias("start_point")).show()Result
+-------------+
| start_point|
+-------------+
|{"x":5,"y":5}|
+-------------+Version table
| Release | Notes |
|---|---|
1.0.0 | Python and SQL functions introduced |
1.5.0 | Scala function introduced |