e4d0d373-8280-4c5c-ac08-79a6266922c1 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-25T00:00:48 creation ISO 19115 2016 North West Shelf Joint Environmental Management Study:InVitro input - Modelling and extrapolation of contaminants e4d0d373-8280-4c5c-ac08-79a6266922c1 Contaminants were modelled as nested sets of polygons representing plumes of differing concentrations spreading from their source. Nodes of the polygons were advected by the currents and 'diffused' at each time step until the contour became so dilute that it was eliminated because the concentrations reached the lower threshold for tracking. Nodes of the plume were also excised if the plume became so thin that the nodes were very close to each other. The temporal spatial footprint is presented as an image time series. {"type": "Polygon", "coordinates": [[[114.0, -24.0], [122.0, -24.0], [122.0, -17.0], [114.0, -17.0], [114.0, -24.0]]]} 114.0 122.0 -24.0 -17.0