df.show()
+--------------------+--------------------+----+--------+---------+--------------------+--------+--------------------+
|             address|         coordinates|  id|latitude|longitude|                name|position|                json|
+--------------------+--------------------+----+--------+---------+--------------------+--------+--------------------+
|Balfour St / Brun...|[-27.463431, 153....|79.0|    null|     null|79 - BALFOUR ST /...|    null|[-27.463431, 153....|
+--------------------+--------------------+----+--------+---------+--------------------+--------+--------------------+

val jsonSchema  = StructType(Seq(
StructField("latitude", DoubleType, nullable = true),
StructField("longitude", DoubleType, nullable = true)))

val a = df.select(from_json(col("json"), jsonSchema) as "content")

a.show() gives me :
+-------+
|content|
+-------+
|   null|
+-------+