Lookup a timezone based on lat/long coords

tzlookup

tzlookup() {
  local err cmd lat long
  err=0
  for cmd in curl jq; do
    command -v "${cmd}" >/dev/null 2>&1 || (( ++err ))
  done
  (( err > 0 )) && { printf -- '%s\n' "Requires 'curl' and 'jq'" >&2; return 1; }

  lat="${1:?No latitude value supplied}"
  long="${2:?No longitude value supplied}"

  case "${lat}" in
    (*[sS]) lat="-${lat/[sS]/}" ;;
    (*[nN]) lat="${lat/[nN]/}" ;;
  esac
  case "${long}" in
    (*[wW]) long="-${long/[wW]/}" ;;
    (*[eE]) long="${long/[eE]/}" ;;
  esac

  curl -s "https://timezone.bertold.org/timezone?lat=${lat}&lon=${long}&s=1" |
    jq -r '.Result'
}