Introduction: Subtract two spectral bands in a Geotiff image(band2 - band1)
Format: RS_Subtract (Band1: ARRAY[Double], Band2: ARRAY[Double])
Return type: Array<Double>
Since: v1.1.0
SQL Example
val subtractDF = spark.sql("select RS_Subtract(band1, band2) as differenceOfOfBands from dataframe")