geotrellis.spark.mapalgebra.local.MultiplyTileRDDMethods.scala Maven / Gradle / Ivy

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GeoTrellis is an open source geographic data processing engine for high performance applications.

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/*
 * Copyright (c) 2014 DigitalGlobe.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package geotrellis.spark.mapalgebra.local

import geotrellis.raster._
import geotrellis.spark._
import geotrellis.spark.mapalgebra._
import geotrellis.raster.mapalgebra.local.Multiply
import org.apache.spark.Partitioner
import org.apache.spark.rdd.RDD

trait MultiplyTileRDDMethods[K] extends TileRDDMethods[K] {
  /** Multiply a constant value from each cell.*/
  def localMultiply(i: Int) =
    self.mapValues { r => Multiply(r, i) }

  /** Multiply a constant value from each cell.*/
  def *(i: Int) = localMultiply(i)

  /** Multiply a constant value from each cell.*/
  def *:(i: Int) = localMultiply(i)

  /** Multiply a double constant value from each cell.*/
  def localMultiply(d: Double) =
    self.mapValues { r => Multiply(r, d) }

  /** Multiply a double constant value from each cell.*/
  def *(d: Double) = localMultiply(d)

  /** Multiply a double constant value from each cell.*/
  def *:(d: Double) = localMultiply(d)

  /** Multiply the values of each cell in each raster. */
  def localMultiply(other: RDD[(K, Tile)]): RDD[(K, Tile)] = localMultiply(other, None)
  def localMultiply(other: RDD[(K, Tile)], partitioner: Option[Partitioner]): RDD[(K, Tile)] =
    self.combineValues(other, partitioner)(Multiply.apply)

  /** Multiply the values of each cell in each raster. */
  def *(other: RDD[(K, Tile)]): RDD[(K, Tile)] = localMultiply(other, None)

  /** Multiply the values of each cell in each raster. */
  def localMultiply(others: Traversable[RDD[(K, Tile)]]): RDD[(K, Tile)] = localMultiply(others, None)
  def localMultiply(others: Traversable[RDD[(K, Tile)]], partitioner: Option[Partitioner]): RDD[(K, Tile)] =
    self.combineValues(others, partitioner)(Multiply.apply)

  /** Multiply the values of each cell in each raster. */
  def *(others: Traversable[RDD[(K, Tile)]]): RDD[(K, Tile)] = localMultiply(others)
}