G'day everyone, I am trying to calculate time spent per grid fromages GPS data obtained on seabirds. I am confused about the MakeGridTopology function of the package trip. Instead of entering a number of cells with cells.dim, I would like to enter a distance - ie I want my grid to be of 50 by 50 m. I've tried playing with cells.dim and cellsize option but I am not managing to get what I need. Could anyone please clarify how to make such a grid? Cheers heaps! Elodie
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