Five years after launch, the Toitū Te Whenua - Land Information New Zealand Basemaps service continues to grow and find new ways to make NZ's vast collections of open geospatial data simple for users to explore and build upon. This talk will provide a quick demo of the product, then dive into some of the trickier problems the Basemaps team has solved to keep the service dirt cheap, beautiful, and lightning-fast. You should leave with a clear idea of the potential outcomes and benefits of building something similar for your geography.