2007-08 V3 CEAMARC-CASO Bathymetry Plots Over Time During Events

• Other Authors: AADC (originator), AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: oceans; WATER DEPTH; EARTH SCIENCE; BATHYMETRY/SEAFLOOR TOPOGRAPHY; OCEAN ACOUSTICS; BATHYMETRY; Echo Sounder; ECHO SOUNDERS; SHIPS; R/V AA > R/V Aurora Australis; AMD/AU; CEOS; AMD; OCEAN > SOUTHERN OCEAN; GEOGRAPHIC REGION > POLAR; Southern Ocean; aurora australis
• Online Access: https://researchdata.ands.org.au/2007-08-v3-time-events/685021; https://data.aad.gov.au/metadata/records/CEAMARC_CASO_200708030_EVENT_BATHYMETRY_PLOTS; http://data.aad.gov.au/eds/2857/download; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2652; https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=2792; http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=CEAMARC_CASO_200708030_EVENT_BATHYMETRY_PLOTS

The bathymetry data has been checked for accuracy. A routine was developed in R ('bathy_plots.R') to plot bathymetry data over time during individual CEAMARC events. This is so we can analyse benthic data in relation to habitat, ie. did we trawl over a slope or was the sea floor relatively flat. Note that the depth range in the plots is autoscaled to the data, so a small range in depths appears as a scatetring of points. As long as you look at the depth scale though interpretation will be ok. The R files need a file of bathymetry data in '200708V3_one_minute.csv' which is a file containing a data export from the underway PostgreSQL ship database and 'events.csv' which is a stripped down version of the events export from the ship board events database export. If you wish to run the code again you may need to change the pathnames in the R script to relevant locations. If you have opened the csv files in excel at any stage and the R script gets an error you may need to format the date/time columns as yyyy-mm-dd hh;mm:ss, save and close the file as csv without opening it again and then run the R script. However, all output files are here for every CEAMARC event. Filenames contain a reference to CEAMARC event id. Files are in eps format and can be viewed using Ghostview which is available as a free download on the internet.