an_mapscale | R Documentation |
Calculate approximate map scale
an_mapscale(map_dimensions, map_extent)
map_dimensions |
numeric: 2-element numeric giving width and height of the map, in mm |
map_extent |
vector of c(longitude_min, longitude_max, latitude_min, latitude_max): the geographic extent of the map. |
numeric
## an A3-sized map of the Southern Ocean (1:20M) an_mapscale(map_dimensions = c(400, 570), map_extent = c(-180, 180, -90, -40))
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