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• 0.9.2
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• Sqrt.scala

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geotrellis.raster.op.local.Sqrt.scala Maven / Gradle / Ivy

package geotrellis.raster.op.local

import geotrellis._
import geotrellis.process._

/**
 * Operation for taking a square root.
 */
object Sqrt extends Serializable {
  /** Take the square root each value in a raster. */
  def apply(r:Op[Raster]) = 
    r.map(_.dualMap(z => if(isNoData(z) || z < 0) NODATA else math.sqrt(z).toInt)
                   (math.sqrt(_)))
     .withName("Sqrt[Raster]")
}