Coordinates from a row, column or cell number
These functions get coordinates of the center of raster cells for a row, column, or cell number of a Raster* object.
## S4 method for signature 'Raster,numeric' xFromCol(object, col) ## S4 method for signature 'Raster,numeric' yFromRow(object, row) ## S4 method for signature 'Raster,numeric' xFromCell(object, cell) ## S4 method for signature 'Raster,numeric' yFromCell(object, cell) ## S4 method for signature 'BasicRaster,ANY' xyFromCell(object, cell, spatial=FALSE, ...) ## S4 method for signature 'Raster' coordinates(obj, ...) ## S4 method for signature 'Extent' coordinates(obj, ...)
object |
Raster* object (or a SpatialPixels* or SpatialGrid* object) |
col |
column number; or vector of column numbers. If missing, the x coordinates for all columns are returned |
row |
row number; or vector of row numbers. If missing, the y coordinates for all rows are returned |
cell |
cell number(s) |
spatial |
If |
... |
additional arguments. None implemented |
obj |
Raster object |
Cell numbers start at 1 in the upper left corner, and increase from left to right, and then from top to bottom. The last cell number equals the number of cells of the Raster* object.
xFromCol, yFromCol, xFromCell, yFromCell: vector of x or y coordinates
xyFromCell: matrix(x,y) with coordinate pairs
coordinates: xy coordinates for all cells
#using a new default raster (1 degree global)
r <- raster()
xFromCol(r, c(1, 120, 180))
yFromRow(r, 90)
xyFromCell(r, 10000)
xyFromCell(r, c(0, 1, 32581, ncell(r), ncell(r)+1))
#using a file from disk
r <- raster(system.file("external/test.grd", package="raster"))
r
cellFromXY(r, c(180000, 330000))
#xy for corners of a raster:
xyFromCell(r, c(1, ncol(r), ncell(r)-ncol(r)+1, ncell(r)))Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.