dirtiles.hpp
std::string dir_read_tile(std::string pbfPath);
void dir_write_tile(const char *outdir, int z, int tx, int ty, std::string const &pbf);
std::string dir_read_tile(std::string pbfPath);
void dir_write_tile(const char *outdir, int z, int tx, int ty, std::string const &pbf);