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Nautical charts

Nautical charts are not regular maps. Regular maps concentrate on land areas, landmarks, roads, railways, etc., whereas nautical charts show details of water areas.

On Nautical charts, land areas and features on charts are drafts and only there to embellish the chart; the nautical chart conveys specifically information to assist in safely navigating the area that the chart covers.
On nautical charts, you can import background maps, like AutoCAD DXF, MicroStation DGN and GeoTIFF.