Definition
The level of detail discernable in a gridded multibeam bathymetry dataset. Resolution is measured in metres by the length and width of a pixel. Resolution is determined by data density which correlates with equipment specifications and sea bed depth. Generally, deep sea beds cause more data spread, resulting in decreased data density and thereby, decreases resolution.
Checks
Depth range
Appropriate resolution
Format
Beam width
Pass Requirements
Depth range: Establish the deepest depth from the dataset. This is what will define the gridded resolution of the multibeam bathymetry data.
Appropriate Resolution: Before running the gridded multibeam bathymetry data through QAX, ensure the gridded resolution aligns with the Dd depth bands from Table 9 of the Australian multibeam guidelines. For example, if the deepest depth surveyed is 300 m, observe the higher resolution band, which in this case is 4 m. Run data through QAX to verify if the data passes.
Format: Ensure the multibeam bathymetry data is gridded as a 32-bit floating point Geotiff as defined in the AusSeabed product specifications.
Beam width: During acquisition, ensure beam width follows the recommendations outlined in Table 7 of the Australian multibeam guidelines.
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