| Local magnetic anomaly polygon (Hydro, 1:90k - 1:350k) | New Zealand Hydrographic Authority | Land Information New Zealand | Creative Commons Attribution 4.0 International | Layer | Vector | 3520 | 64 | ||
| Seabed area points (Hydro, 1:1.5mil and smaller) | New Zealand Hydrographic Authority | Land Information New Zealand | Creative Commons Attribution 4.0 International | Layer | Vector | 2292 | 32 |