Coordinates

If the imported bathymetry was geotagged, dBSea will choose a suitable projection for the data based on the UTM zone of the centre of the map. dBSea uses the expanded notation for UTM zones, meaning that all locations have a numerical code (01-60) counting from the meridian at 180 degrees west to the meridian at 180 degrees east in 6-degree increments, and an alphabetical code based on latitude (C-X, omitting "I" and "O").

Note that some official UTM zones do not follow this grid, particularly around Norway and Svalbard. dBSea ignores this and calculates zones as if the grid were not distorted in those areas. Additionally, zones A, B, Y, and Z are not covered.

Image 1: UTM zones of the world, with numerical and alphabetical zone designations.