Trait/Object

geotrellis.raster

CellFeatures

Related Docs: object CellFeatures | package raster

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trait CellFeatures[R, D] extends AnyRef

Type class to convert a raster into features of cell geometries

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  1. abstract def cellFeatures[G <: Geometry](raster: R, geom: Geometry, options: Options, cellGeom: (Long, Long) ⇒ G): Iterator[Feature[G, D]]

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    Given a geometry, produce an iterator of cell features intersecting this geometry.

    Given a geometry, produce an iterator of cell features intersecting this geometry. Relating geometry to raster cell grid is rasterization, options for this are given. The call will decide how each cell will be represented as geometry (Point, Polygon)

    raster

    source of cell values

    geom

    geometry filter, only cells under this geometry will be returned

    options

    rasterizer options that specify which cells should be considered as intersection geom

    cellGeom

    function that converts a cell, specified by column and row into geometry (Point, Polygon)

    Note

    Conceptually rasterisation must happen but it is left to interface implementer to decide how to do it. Potentially the raster will need to be read in chunks.

    ,

    This method returns an Iterator because the feature representation of raster will require significantly more memory and it may not be possible to hold all features from a "large" raster tile in memory. It is assumed that either filter, fold or sink will be the next step.

  2. abstract def cellGrid(raster: R): GridExtent[Long]

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    Describe cell grid of the source raster

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