Handles reading raster RDDs and their metadata from a filesystem.
AttributeStore that contains metadata for corresponding LayerId
This function will read an RDD layer based on a query.
Type of RDD Key (ex: SpatialKey)
Type of RDD Value (ex: Tile or MultibandTile )
Type of Metadata associated with the RDD[(K,V)]
The ID of the layer to be read
The desired number of partitions in the resulting RDD.