data.govt.nz is New Zealand's open data catalog, indexing datasets published by government agencies and councils. It is the central discovery point for New Zealand public-sector data across many themes.
For geospatial work it complements the LINZ Data Service: where LINZ provides authoritative topographic, property, and address data, data.govt.nz surfaces the broader catalog of statistical, environmental, and administrative datasets. Most data is released under Creative Commons Attribution.