Description Usage Arguments Value Examples
The Contsructor of the EtrsCells object
1 2 3 | ## S4 method for signature 'data.frame,numeric'
etrsCells(etrs.table.codes = "data.frame",
cell.size = "numeric")
|
etrs.table.codes |
a data frame CELLCODE,EASTOFORIGIN,NORTHOFORIGIN |
cell.size |
a numeric 0.5m, 1m, 2.5m, 5m, 10m, 25m, 50m, 100m, 250m, 500m, 1Km, 2.5Km, 5Km, 10Km, 25Km, 50Km, 100Km |
an EtrsCells object
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | bb <- bbox(cbind(c(4321000, 4323000), c(3210000,3212000)))
cell.size = 1000
# Calculate the limits of the grid
bb.outer.limits <-
cbind((floor(bb[, 1] / cell.size)) * cell.size, (ceiling(bb[, 2] / cell.size)) * cell.size)
# Calculates eastings
eastings <-
seq(from = bb.outer.limits[1, 1], to = bb.outer.limits[1, 2], by = cell.size)
# Calculates northings
northings <-
seq(from = bb.outer.limits[2, 1], to = bb.outer.limits[2, 2], by = cell.size)
eastings.northings <- as.matrix(expand.grid(eastings, northings))
low.corner.cell.etrs.points<-etrsPoints(eastings.northings = eastings.northings,cell.size =1000)
df <-EtrsTableCodes(eastings.northings,1000)
sp.df <- etrsCells(df,1000)
summary(sp.df)
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