Added checking of drifter z-locations. To keep things simple for now, I only check whether the initial z0 locations provided are within 1m of the bottom. I do this by making an interpolation function for water depth, and checking the water depth at the provided (lon0, lat0) locations.
Added checking of drifter z-locations.
To keep things simple for now, I only check whether the initial z0
locations provided are within 1m of the bottom. I do this by making
an interpolation function for water depth, and checking the water
depth at the provided (lon0, lat0) locations.

dcherian/tracpy,kthyng/tracpy