We have an easy way to collect a histogram for `RDD` of `Tile`. We should have a similar method for `MultibandTile` that returns `Array[Histogram[Double]]` Ref: https://github.com/geotrellis/geotrellis/blob/master/spark/src/main/scala/geotrellis/spark/summary/StatsTileRDDMethods.scala#L50
We have an easy way to collect a histogram for
RDDofTile. We should have a similar method forMultibandTilethat returnsArray[Histogram[Double]]Ref: https://github.com/geotrellis/geotrellis/blob/master/spark/src/main/scala/geotrellis/spark/summary/StatsTileRDDMethods.scala#L50