RT_NumBands takes a raster column and returns a numeric value that represents the number of bands in the raster.
| Function | Syntax |
|---|---|
| Python | num |
| SQL | RT |
| Scala | num |
For more details, go to the GeoAnalytics Engine API reference for num_bands.
Examples
from geoanalytics.raster import functions as RT
data = [([1,2,3,4], )]
df = spark.createDataFrame(data, ["pixels"]) \
.withColumn("raster", RT.create_raster("pixels", 2, 2, "float32"))
df.select(RT.num_bands("raster").alias("num_bands")).show(truncate=False)Result
+---------+
|num_bands|
+---------+
|1 |
+---------+Version table
| Release | Notes |
|---|---|
2.0.0 | Python, SQL, and Scala functions introduced |