How is the discount calculated on map tiles?
The discount on maps is calculated so that tiles become cheaper as the number of tiles in a purchase goes up. So the price starts at 8 a tile up to four tiles. From five to nine tiles the price reduces to 7 per tile; 6 from 10 to 24; and for twenty-five tiles and above the price reduces to only 5! So the more you buy, the less you pay for each tile. • Why is there a limit on the number of tiles a school can hold? Ordnance Survey has to limit the number of tiles a school can hold to prevent tiles getting into general circulation and so reduce the value of its investment in surveying and creating the tiles. We think that the current limit of 100 tiles is enough for almost any school doing geographical work in their local area and on field trips. If a school finds that it is at the limit but needs tiles not in its collection you can select tiles for deletion. You must then securely delete all copies of those tiles, including backup copies. Then send us a letter giving the names of the til
