These maps show the relative percentage contribution of net internal migration, net international migration and total net migration to the Estimated Resident Population of each territorial authority or regional council area in each census year. The data to 2013 are drawn from the MBIE-funded project Nga Tangata Oho Mairangi (NTOM) (The Impact of Demographic Change on New Zealand's Communities) and converted for data visualisation by the CaDDANZ Population Atlas research team. Data for 2013-2018 have been developed using the same methodology. See for additional detail and important methodological notes.