ST_Shear

ST_Shear takes a geometry column and two numbers and returns a geometry column. The result is the input geometry with its coordinates translated to a distance proportional to the original coordinate values. The proportions used for x and y coordinates are specified with the proportion_x and proportion_y parameters respectively.

Function	Syntax
Python	`shear(geometry, proportion_x, proportion_y)`
SQL	`ST_Shear(geometry, proportion_x, proportion_y)`

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

Examples

Python

SQL

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from geoanalytics.sql import functions as ST

data = [("POLYGON ((0 0, 0 5, 5 5, 5 0, 0 0))", )]

df = spark.createDataFrame(data, ["wkt"]) \
          .withColumn("geometry", ST.poly_from_text("wkt", srid=4326))

df_shear = df.select(ST.shear("geometry", proportion_x=0.5, proportion_y=0.5).alias("shear"))

ax = df.st.plot("geometry", facecolor="none", edgecolor="red")
df_shear.st.plot(ax=ax, facecolor="none", edgecolor="blue")

Plotted example for ST_Shear — Plotted result for ST_Shear.

Version table

Release	Notes
1.2.0	Function introduced

ST_Shear

Examples

Version table

Related topics