bluertopo               Download and extract NOAA BlueTopo bathymetry
bluertopo_cache_clear   Clear package-owned cache content
bluertopo_cache_dir     Locate the bluertopo cache directory
bluertopo_download      Download original NOAA BlueTopo assets for an
                        AOI
bluertopo_resolution    Construct a BlueTopo native-resolution policy
bluertopo_tile_polygons
                        Retrieve all BlueTopo tile polygons
bluertopo_tiles         Discover BlueTopo tiles intersecting an AOI
