The raster functions for cell abstraction

Michael Sumner

2024-01-10

Source: vignettes/cell-index-raster-abstraction.Rmd

The following functions in the raster package are designed to work with cell indexes.

fun(r, cell)

  • [
  • adjacent
  • colFromCell
  • extentFromCells
  • rasterFromCells
  • rowColFromCell
  • rowFromCell
  • validCell
  • xyFromCell
  • xFromCell
  • yFromCell

The following functions will return cell indexes.

fun(r, query) to return cells

  • cellFromCol
  • cellFromLine
  • cellFromPolygon
  • cellFromRow
  • cellFromRowCol
  • cellFromRowColCombine
  • cellFromXY
  • cellsFromExtent
  • fourCellsFromXY

Others

  • setValues will work as fun(r, vals, index) only for RasterLayerSparse
  • extent(Raster, r1, r2, c1, c2) to crop an extent by row/column