Editing vector graphics, including geographic maps

For processing by simplification / reconstruction an image comprising areas defined by polygonal lines including the points defining the lines are initially stored in memory, - are organized in a database (SER) hierarchical remaining points of sets of each polygonal line after various simplifications of the initial image with different respective coefficients of simplification, according to a simplification coefficient identifier, and - for a reconstruction processing (33), use is made of a simplification coefficient identifier selected, to recover the database of points allowing reconstruction of the image at simplification coefficient selected.