zˈɪŋkoʊ ɔːɹ fˌoʊɾoʊzɪŋkˈɑːɡɹəfi dɪvˈɛləpt æt ðɪ ˈɔːɹdnəns sˈɜːveɪ ˌaʊɾəv ɐ nˈiːd tə ɹᵻdˈuːs lˈɑːɹdʒskˈeɪl mˈæps mˈoːɹ ɪfˈɛktɪvli.
Zinco or photozincography developed at the Ordnance Survey out of a need to reduce large-scale maps more effectively.