summary

Type Members

1. trait GridVisitor[-T <: Grid[Int], +R] extends Serializable

   

   Visitor used to reduce values in a two-dimensional grid T to a single result R

   Visitor used to reduce values in a two-dimensional grid T to a single result R

   The user should implement concrete subclasses that update the value of result as necessary on each call to visit(raster: T, col: Int, row: Int).

   Note

   User implementations intended to be used with geotrellis.spark.summary.polygonal.RDDPolygonalSummary must have a zero argument constructor so that new instances can be instantiated automatically. GridVisitor is contravariant in T and covariant in R in the same fashion as Function1. This allows more generic concrete Visitor class implementations to satisfy type constraints for T at the call site, and the inverse is true for R. As a contrived example using GeoTrellis types, where Raster is a subtype of CellGrid: val DoubleVisitor: GridVisitor[CellGrid[Int], Double] = ??? def usesRaster(visitor: GridVisitor[Raster[Tile]], Any]): Unit = ??? usesRaster(DoubleVisitor) will compile. For an alternate explanation on covariance and contravariance that might help to clarify this, see: - https://stackoverflow.com/a/10604305 - https://stackoverflow.com/a/38577878

   ,

   Be sure to handle the empty state. This could occur if no points in T are ever visited.

2. trait Implicits extends AnyRef

   

3. trait MultibandTileSummaryMethods extends MethodExtensions[MultibandTile]

   

   Trait containing MultibandTile extension methods for summaries.

4. trait SinglebandTileSummaryMethods extends MethodExtensions[Tile]

   

   Trait containing Tile extension methods for summaries.

5. case class Statistics[T](dataCells: Long = 0, mean: Double = Double.NaN, median: T, mode: T, stddev: Double = Double.NaN, zmin: T, zmax: T) extends Product with Serializable

   

   Data object for sharing the basic statistics about a raster or region.