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Articles

Volume 7, Number 1 (2006)

Zones of Confidence (ZOC) for New Zealand

Submitted
August 13, 2013
Published
2006-01-01

Abstract

In July 2004 HSA Systems Ltd commenced a project for Land Information New Zealand to assess and assign Zones of Confidence to all hydrographic surveys incorporated within 138 hydrographic charts of New Zealand. This article provides an overview of the process to create a detailed picture of the quality and extent of New Zealand's hydrographic survey resource. Each hydrographic survey was assessed in relation to the data quality aspects of the International Hydrographic Organisation (IHO) S-57 Standard. The project team assessed in excess of 1,792 survey fair sheets and allocated 1,465 Zones of Confidence to survey areas.