A set of centroids for the grid to calculate effort by station using Voronoi diagram to fetch nearest station, additionally clipped by land (rnaturalearthhires::states10).
cc_grid_ctrsA sf spatial feature set with
station key in the form of "lin,pos"
alongshore line in CalCOFI coordinate system
offshore position in CalCOFI coordinate system
difference in position, from 5 (nearshore), 10 (offshore) to 20 (outside 113 station extended area)
station latitude and longitude in decimal degree geographic coordinates (SRID 4326)