| Description | The United Nations recommended system was approved in 1967 (
I/13), based on the official system adopted by Iran and
published in its English version as Transliteration of
Farsi Geographic Names to Latin Alphabet (September 1966).
The romanization table was also published as an annex to
the Toponymic Guidelines for the Islamic Republic of Iran
in 2000 (Toponymic Guidelines for map and other editors –
Revised edition 1998. Submitted by the Islamic Republic of
Iran. UNGEGN, 20th session. New York, 17-28 January 2000,
Working Paper No. 41.).
The system is used in the Islamic Republic of Iran and in
international cartographic products.
Persian (Farsi) uses the Perso-Arabic script that is
written from right to left. The Persian script usually
omits vowel points and diacritical marks from writing which
makes it difficult to obtain uniform results in the
romanization of Persian. The romanization is generally
reversible though there are some ambiguous letter
sequences (kh, sh, th, zh) which also may represent the
romanized values of two Persian characters in addition to
the respective single ones.
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