This specification is provided as the authoritative reference for the maintenance of New Zealand’s source data, and is to be used as a supplement to the IHO publication “S-57 Appendix B.1 Annex A – Use of the Object Catalogue for ENC” (UOC).
This specification has three purposes:
- To clarify where necessary and provide additional guidance where an IHO specification may not be mandatory.
- To expand those clauses in the UOC which are left open to national discretion and require further definition
- To ensure a seamless data coverage in regards to horizontal and vertical consistency.
Unless otherwise specified in this document the UOC will be followed.