ST_GeomFromBinary takes a binary column and returns a geometry column. The input binary column must contain the
well-known binary (WKB)
representation of geometries. You can optionally specify a spatial reference for the result geometry column.
The sr parameter value must be a valid SRID or WKT string.
This function should only be used when you don't know the geometry type represented by the input column or when the input column contains more than one geometry type. In other cases, use the function specific to the geometry type of your input data (i.e. ST_PointFromBinary, ST_LineFromBinary, ST_MPointFromBinary, or ST_PolyFromBinary).
| Function | Syntax |
|---|---|
| Python | geom |
| SQL | ST |
| Scala | geom |
For more details, go to the GeoAnalytics Engine API reference for geom_from_binary.
This function implements the OpenGIS Simple Features Implementation Specification for SQL 1.2.1
Examples
from geoanalytics.sql import functions as ST
line_binary= bytearray(b'\x01\x02\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00>@\x00\x00\x00\x00\x00\x00$@\x00\x00\x00\x00\x00\x00$@\x00\x00\x00\x00\x00\x00>@\x00\x00\x00\x00\x00\x00D@\x00\x00\x00\x00\x00\x00D@')
polygon_binary = bytearray(b'\x01\x03\x00\x00\x00\x01\x00\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00>@\x00\x00\x00\x00\x00\x00$@\x00\x00\x00\x00\x00\x00D@\x00\x00\x00\x00\x00\x00D@\x00\x00\x00\x00\x00\x004@\x00\x00\x00\x00\x00\x00D@\x00\x00\x00\x00\x00\x00$@\x00\x00\x00\x00\x00\x004@\x00\x00\x00\x00\x00\x00>@\x00\x00\x00\x00\x00\x00$@')
df = spark.createDataFrame([(polygon_binary,), (line_binary,)], ["wkb"])
df.select(ST.geom_from_binary("wkb", sr=4326).alias("geom_from_binary")).show(truncate=False)+-----------------------------------------------------+
|geom_from_binary |
+-----------------------------------------------------+
|{"rings":[[[30,10],[10,20],[20,40],[40,40],[30,10]]]}|
|{"paths":[[[30,10],[10,30],[40,40]]]} |
+-----------------------------------------------------+Version table
| Release | Notes |
|---|---|
1.0.0 | Python and SQL functions introduced |
1.5.0 | Scala function introduced |