| Summary Improving Hydrographic Information Zones of Confidence (ZOC) for New Zealand (2008) | |||||||||||||
Abstract | |||||||||||||
| Information New Zealand (LINZ) to assess and assign Zones of Confidence (ZOCs) to all hydrographic surveys incorporated within 138 hydrographic charts of New Zealand. The project required each hydrographic survey to be assessed in relation to the data quality aspects of the International Hydrographic Organisation (IHO) S-57 Standard. During the survey assessment process the project team was cognisant of the Australian Hydrographic Service, RAN recommendations and experience with ZOC assessment. The application of an extensive local knowledge of hydrographic surveying practices undertaken in New Zealand was crucial to the project. This paper will describe the process by which HSA assessed in excess of 1,792 hydrographic survey fair sheets and allocated 1,465 ZOCs to survey areas. ZOC metadata and polygon coordinates were captured using the IHO S-57 version 3.1 format prior to export in eXtensible Markup Language (XML) format. | |||||||||||||
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