Working and Publication Scale.

Once you have selected a size and a scale for the finished map, you can then determine the worksheet scale. Some media do not allow reduction of your map. But if reproduction will be done by a process that allows reduction, you may want to compile and draft your map at a larger scale and then reduce it to the publication scale. Indeed, a large working scale, not more than 150 % or 200 % for generalisation reasons, allows detailed and precise work. The greatest problem in designing for severe reduction involves line widths. Lines that appear correct at the working scale can appear a little "light" when the map is reduced. Consequently, you must make the map lines "heavy" so that it will not look too light after reduction. You also need to exaggerate type sizes somewhat, just as you must make lines and symbols a little too large on the drawing. The following illustration shows some of these relationships.