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Lines are drawn on a map to show where features are found.We collect new data to update our map and also use data from other sources.This map shows the currently mapped trimlines in Ireland.This map is to the scale 1:50,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 500m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as polygons. 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