Description Usage Arguments Details Value See Also Examples
View source: R/extractByMask.R
This function extracts the values from a given input raster based on a mask.
1 | extractByMask(layer, msk, spatial = FALSE, rast = NULL)
|
layer |
an object of class "RasterLayer" (package raster). The raster from which data will be extracted |
msk |
an object of class "RasterLayer" or a two column matrix of coordinates. The reference raster (or coordinates) to be used as mask for extraction. |
spatial |
logical. Should the output be spatially explicit -i.e. a georeferenced raster?
Default is FALSE, returning a vector of extracted values from |
rast |
deprecated, use |
When input data given to rast
does not match the resolution and extent of a raster mask argument, the latter is preferred. The function will therefore return a vector of n elements, one for each non NA cell in the mask. Input raster cells falling inside mask cells, but not over their cells centre will be ignored.
a vector, or an object of class "RasterLayer". The values from the input raster (rast
argument) at coordinates provided as matrix, or those overlapping with non NA cells in the mask raster. If spatial == TRUE
an object of class "RasterLayer" is returned.
1 2 3 4 5 6 7 8 9 | data(ConwyData)
list2env(ConwyData, environment())
m <- aoi(msk=ConwyLU, mskSub=c(2,3))
head( extractByMask(ConwySlope, msk=m), 20)
# Extract making a raster
library(raster)
plot( extractByMask(ConwySlope, msk=m, spatial=TRUE) )
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