FLightR (version 0.4.5)

make.grid: makes spatial grid

Description

This function makes a rectangular grid with use defined boudnaries and probabilities of being stationary.

Usage

make.grid(left = -180, bottom = -90, right = 180, top = 90, distance.from.land.allowed.to.use = c(-Inf, Inf), distance.from.land.allowed.to.stay = c(-Inf, Inf), plot = TRUE, return.distances = FALSE, probability.of.staying = 0.5)

Arguments

left

- left boundary in degrees (-180

bottom

- lower boundary in degrees (-90

right

- right boundary in degrees (-180

top

- top boundary in degrees (-90

distance.from.land.allowed.to.use

- define how far from the shoreland animal could occur. Unit - km, egative values are for inland and positive for offshore directions. Inf stays for infinity

distance.from.land.allowed.to.stay

- define how far from the shoreland animal could stay stationary between twilights. Unit - km, egative values are for inland and positive for offshore directions. Inf stays for infinity

plot

show a plot of final grid.

return.distances

- return distances to the shoreline

probability.of.staying

- assigned probability value for grid cells that do not satisfy distance.from.water.allowed.to.stay

Value

dataframe with coordinates(lon and lat) and probability.of.staying

Examples

Grid<-make.grid(left=-14, bottom=30, right=13, top=57,
  distance.from.land.allowed.to.use=c(-Inf, Inf),
  distance.from.land.allowed.to.stay=c(-Inf, Inf))