How much city fits on an A3 sheet
The first decision on a city poster is how wide a stretch of ground to show. Everything else follows from it. On an A3 portrait page with 10 mm margins the map is 277 mm wide, so the distance you frame sets the scale of the print.
A city block is a handy yardstick. Once a typical 100 m block shrinks below about 2 mm on paper, the minor streets merge into a fine grey texture and the main roads, rivers and parks start carrying the picture.
| Ground across the map | Scale | 100 m block on paper | Works well for |
|---|---|---|---|
| 3 km | about 1:11,000 | 9 mm | One neighbourhood or an old town, with room for street names |
| 6 km | about 1:22,000 | 4.6 mm | A compact city centre with its river or harbour |
| 12 km | about 1:43,000 | 2.3 mm | Paris inside the Périphérique, where districts and boulevards carry the poster |
| 25 km | about 1:90,000 | 1.1 mm | A whole mid-sized city and the edge where it meets the country |
| 60 km | about 1:217,000 | 0.5 mm | London inside the M25, where motorways and the Thames do the work |
- To print the scale on the poster itself, turn on the scale bar in Layout › Map elements and choose metric or imperial units.



