{CF8511AB-BE8F-48CC-80CE-800ACD362CB1} dataset Richard Garlick NIWA GIS Manager 04 386 0300 04 386 2153 310 Evans Bay Parade Wellington New Zealand r.garlick@niwa.co.nz 2021-10-18T12:06:53 ISO 19139 Geographic Information - Metadata - Implementation Specification 2007 20968 3994 EPSG 6.18(10.0.0) Navigation Multibeam Lines November 2013 2002-10-01 Kevin Mackay NIWA Database Administrator 04 386 0300 04 386 2153 310 Evans Bay Parade Wellington New Zealand k.mackay@niwa.co.nz Centre line navigation extracted from em300 multibeam data files. Use for searching line numbers and coverage details. Raw multibeam data held in archives in the Greta Point Tape Store and a duplicate copy on R.V. Tangaroa in the multibeam lab. Kevin Mackay NIWA Database Administrator 04 386 0300 04 386 2153 310 Evans Bay Parade Wellington New Zealand k.mackay@niwa.co.nz Downloadable Data elevation geoscientificInformation oceans transportation Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 true -180.00 180.00 -76.14553 -24.970202 SDE Feature Class Kevin Mackay NIWA GIS Administrator 04 386 0300 04 386 2153 310 Evans Bay Parade Wellington New Zealand k.mackay@niwa.co.nz Raw multibeam in simrad formats, navigation metadata in SDE geodatabase Raw multibeam data written to tape using TAR on DLIIIxt tapes, nav metadata in SDE 8.1, Oracle 8 XY coordinates extracted from em300 data files for centre beam position. Decimated so that only every 10th position used to reduce file sizes. Extraction of data scripted on Tesla processing workstation: 1. Run unix script nav2arcinfo *.em3000.nav 2. At Arc prompt run &r load_lines This process produces a line coverage of the centrebeam positions with segments atributed with line number and Cruise ID.