oʊfˈæɹəl ɪmpɹˈuːvd ðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd θˈɜːɾi nˈaɪn stɹˈiːt mˈæps pɹədˈuːst baɪ ðə fˈɔːɹmɚ mˈɛksɪkən ˈælkældə mˈeɪɚ ʌv jˈɜːbə bjˈuːənə, fɹænsˈɪskoʊ ɡɛɹˈɛɹoʊ, ænd hɪz swˈɪs sɚvˈeɪɚ, dʒˈiːn ʒˈæk vˈaɪɑːdʒɪt.
O'Farrell improved the 1839 street maps produced by the former Mexican alcalde (mayor) of Yerba Buena, Francisco Guerrero, and his Swiss surveyor, Jean Jacques Vioget.