Tile disk usage

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Average tile size is 633 B on tile - March 2011.

OSM does NOT pre-render every tile. Pre-rendering all tiles would use around 54000GB of storage. As the following table shows, the majority of tiles are never viewed. In fact just 1.79% are viewed. It works out this way because the majority of tiles are at zoom level 18 and actually the majority contain nothing of interest. By following an on-the-fly rendering approach we can avoid rendering these tiles unnecessarily. The tile view count column shows how many tiles have been produced on the OSM Tile server.

Tile server disk usage: 1272GB used. (6 Jan 2012). (z0 to z15: 252GB, z16 to z18: 1020GB)

Zoom Tile view count Maximum (4^zoom)  % viewed on tile (March 2011) Newer value % viewed on tile
0 1 1 100
1 4 4 100
2 16 16 100
3 64 64 100
4 256 256 100
5 1,024 1,024 100
6 4,096 4,096 100
7 16,384 16,384 100
8 65,536 65,536 100
9 262,144 262,144 100
10 1,048,576 1,048,576 100
11 4,194,304 4,194,304 100
12 13,475,072 16,777,216 80.32
13 35,640,512 67,108,864 53.11
14 87,820,928 268,435,456 32.72
15 163,872,384 1,073,741,824 15.26
16 287,448,064 4,294,967,296 6.69
17 429,535,936 17,179,869,184 2.50
18 617,515,264 68,719,476,736 0.90
Total 1,640,900,565 91,625,968,981 1.79


See also