Package

geotrellis.raster

hydrology

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package hydrology

Visibility
  1. Public
  2. All

Type Members

  1. class CursorFillCalc extends CursorCalculation[Tile] with IntArrayTileResult

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  2. class CursorFillCalcDouble extends CursorCalculation[Tile] with DoubleArrayTileResult

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  3. case class FillOptions(threshold: Double) extends Product with Serializable

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  4. trait HydrologyMethods extends MethodExtensions[Tile]

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Value Members

  1. object Accumulation

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    An object which houses functions related to hydrological accumulation.

  2. object Fill

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    Fills sink values in a raster.

    Fills sink values in a raster. Returns a raster of DoubleConstantNoDataCellType

    Note

    The threshold in the options will be used to determine whether or not something is a sink, so if you find that this operation is incorrectly classifying your data, make sure you have set the threshold appropriately.

  3. object FillOptions extends Serializable

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  4. object FlowDirection

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    Operation to compute a flow direction raster from an elevation raster

    Operation to compute a flow direction raster from an elevation raster

    The directional encoding is from: Greenlee,D. D. 1987. "Tile and Vector Processing for Scanned Linework." Photogrammetric Engineering and Remote Sensing (ISSN 0099-1112),vol. 53,Oct. 1987,p. 1383-1387.

    The direction of flow is towards the neighboring cell with the largest drop in elevation. If two or more cells have the same drop in elevation,their directional values are added together. The 8-bit encoding of the direction preserves the multi-directional property.

    Sinks, cells which have no drop in elevation towards any neighbor, have no direction of flow.

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