geotrellis.spark.mapalgebra.local.SubtractTileRDDMethods.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.Subtract
import org.apache.spark.Partitioner
import org.apache.spark.rdd.RDD

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

  /** Subtract a constant value from each cell.*/
  def -(i: Int) = localSubtract(i)

  /** Subtract each value of a cell from a constant value. */
  def localSubtractFrom(i: Int) =
    self.mapValues { r => Subtract(i, r) }

  /** Subtract each value of a cell from a constant value. */
  def -:(i: Int) = localSubtractFrom(i)

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

  /** Subtract a double constant value from each cell.*/
  def -(d: Double) = localSubtract(d)

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

  /** Subtract each value of a cell from a double constant value. */
  def -:(d: Double) = localSubtractFrom(d)

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

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

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

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