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Convert Polylines to Polygons

This menu choice is only available for active polyline themes. For each of the selected polylines, the co-ordinates of the points defining the polyline will be used to create a polygon, which is written to a shapefile. Each polygon gets the attributes of the polyline it was created from. The user is prompted whether to force closure on all polylines. If the user responds No, only polylines where the first and last point is equal (i.e. closed polylines) can be converted to polygons.