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With grid_filter()
you may filter occurrence records
inside grid cells in order to keep only the record with the highest
confidence level in each grid cell.
As example, we will filter the occ.class
in square grid
cells of 0.5 decimal degree of side, which is the default grid cell size
of grid_filter()
. You can provide the height and width of
the grid cell in grid.resolution
argument, or provide a
raster layer in argument r
from which the cell is used to
filter occurrences.
# Load package and data
library(naturaList)
data("A.setosa")
data("speciaLists")
# classification
occ.class <- classify_occ(A.setosa, speciaLists)
# grid filtering
occ.grid <- grid_filter(occ.class)
dim(occ.grid)
table(occ.grid$naturaList_levels)
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