<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Seabed discrimination data from SeaScan™"^^ . "Raw data from SeaScan™ transects off Wide Bay (south Queensland) taken in August 2007 as part of a study of ecological factors influencing the distribution of spanner crabs (Ranina ranina). The dataset (comma-delimited ascii file) comprises the following fields: \r\n\r\n1.\trecord number\r\n2.\tdate-time (GMT)\r\n3.\tdate-time (AEST)\r\n4.\tlatitude (signed decimal degrees)\r\n5.\tlongitude (decimal degrees)\r\n6.\tspeed over ground (knots)\r\n7.\tdepth (m)\r\n8.\tseabed roughness (v) \r\n9.\thardness (v) \r\n\r\nIndices of roughness and hardness (from the first and second echoes respectively) were obtained using a SeaScan™ 100 system (un-referenced) on board the Research Vessel Tom Marshall, with the ship’s Furuno FCV 1100 echo sounder and 1 kW, 50 kHz transducer. Generally vessel speed was kept below about 14 kt (typically ~12 kt), and the echo-sounder range set to 80 m. The data were filtered to remove errors due to data drop-out, straying beyond system depth limits (min. 10 m), or transducer interference."^^ . . . . . . . . "Ian Walkden."^^ . "Brown"^^ . "Ian Walkden. Brown"^^ . . "Department of Agriculture, Fisheries and Forestry, Qld"^^ . . . . . . . "Seabed discrimination data from SeaScan™ (Plain Text)"^^ . . . "SeaScan_31Aug2007_dataset.asc"^^ . . "HTML Summary of #6184 \n\nSeabed discrimination data from SeaScan™\n\n" . "text/html" . . . "Science (General)"@en . .