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 54 TB 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.

Gorilla-server.svgTile 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 % stored on Gorilla-server.svgtile server (November 2015)
0 1 1 100 100
1 4 4 100 100
2 16 16 100 100
3 64 64 100 100
4 256 256 100 100
5 1,024 1,024 100 100
6 4,096 4,096 100 100
7 16,384 16,384 100 100
8 65,536 65,536 100 100
9 262,144 262,144 100 100
10 1,048,576 1,048,576 100 100
11 4,194,304 4,194,304 100 100
12 13,475,072 16,777,216 80.32 100
13 35,640,512 67,108,864 53.11 93.184
14 87,820,928 268,435,456 32.72 43.748
15 163,872,384 1,073,741,824 15.26 26.061
16 287,448,064 4,294,967,296 6.69 11.719
17 429,535,936 17,179,869,184 2.50 4.892
18 617,515,264 68,719,476,736 0.90 0.258
19 - 274,877,906,944 - 0.023
Total 1,640,900,565 366,503,875,925 1.79


See also