This can be reasonably coarse; meter-precision is neither necessary nor practically meaningful. It should fully cover the area, but does not need to add additional buffers/offsets beyond that. region: ...

⭐ PHP library providing ISO codes with localization: country (ISO 3166-1), subdivision (ISO 3166-2), language (ISO 639-3), currency (ISO 4217) and scripts (ISO 15924) ...