Packages

c

geotrellis.raster.summary.polygonal.visitors

MultibandTileCombineVisitor

abstract class MultibandTileCombineVisitor[R] extends GridVisitor[Raster[MultibandTile], Array[R]]

A helper for constructing visitors for Raster[MultibandTile] as long as R conforms to Cats.Monoid

In other words, as long as you can define a empty state and a combine operation on your type R, this visitor can automatically generate a Visitor for polygonal summaries on your type R.

Note that this visitor will combine values band-wise. If you'd prefer to accumulate values in some other way, you'll need to implement your own visitor.

Linear Supertypes
GridVisitor[Raster[MultibandTile], Array[R]], Serializable, Serializable, AnyRef, Any
Known Subclasses
MultibandTileMaxVisitor, MultibandTileMeanVisitor, MultibandTileMinVisitor, MultibandTileSumVisitor
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Inherited
  1. MultibandTileCombineVisitor
  2. GridVisitor
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new MultibandTileCombineVisitor()(implicit arg0: Monoid[R], arg1: ClassTag[R])

Abstract Value Members

  1. abstract def fromDouble(value: Double): R

Concrete Value Members

  1. def result: Array[R]

    Called when a result is desired by the parent implementation.

    Called when a result is desired by the parent implementation.

    No guarantees are made that this will only be called after all visitation is complete. As a result, this should return an iterative result as cells are visited for full compatibility.

    returns

    R

    Definition Classes
    MultibandTileCombineVisitor → GridVisitor
  2. def visit(raster: Raster[MultibandTile], col: Int, row: Int): Unit

    Called when the visitor requests a unit of computation for the given col and row.

    Called when the visitor requests a unit of computation for the given col and row.

    The visitor result should be updated within this method as appropriate for the implementation.

    col

    The column in the grid being visited

    row

    The row in the grid being visited

    Definition Classes
    MultibandTileCombineVisitor → GridVisitor
    See also

    polygonal.visitors.TileCombineVisitor and polygonal.visitors.MaxVisitor for an example concrete implementation.