![osm-heatmap-black osm-heatmap-black](http://oldogd.dev.firefishy.com/wp-content/uploads/2009/06/osm-heatmap-black-300x300.png)
Check out this heatmap of Tiles@Home data. It shows the size, and thus an approximate complexity, of T@H tiles uploaded to the server. A blank tile of the middle of the sea is much smaller than tiles with complex map data on them. Click for the original image an read more here
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