ðɪs mˈɛθəd ɛnˈeɪbəld ðɪ ˈækjʊɹət ɹᵻpɹədˈʌkʃən ʌv ˈɪmɪdʒᵻz, mˈænjuːskɹˌɪpt tˈɛkst ænd ˈaʊtlaɪn ɛŋɡɹˈeɪvɪŋz, wˌɪtʃ pɹˈuːvd ɪnvˈæljuːəbəl wɛn ɚɹˈɪdʒɪnəli jˈuːzd tə kɹiːˈeɪt mˈæps dˈʊɹɹɪŋ ðɪ ˈɔːɹdnəns sˈɜːveɪ ʌv ɡɹˈeɪt bɹˈɪtən dˈʊɹɹɪŋ ðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈɪfti z, kˈæɹid ˈaʊt baɪ ðə ɡˈʌvɚnmənts tˌɑːpəɡɹˈæfɪkəl dᵻpˈɑːɹtmənt, hˈɛdᵻd baɪ kˈɜːnəl sˌɜː hˈɛnɹi dʒˈeɪmz.
This method enabled the accurate reproduction of images, manuscript text and outline engravings, which proved invaluable when originally used to create maps during the Ordnance Survey of Great Britain during the 1850s, carried out by the government's Topographical Department, headed by Colonel Sir Henry James.