[OSM-talk] Extra zoom level needed?

Eric Marsden eric.marsden at free.fr
Mon May 17 20:44:41 BST 2010


>>>>> "md" == Maarten Deen <mdeen at xs4all.nl> writes:

  md> Adding a zoomlevel adds 4 tiles for each tile in the previous zoomlevel.
  md> You'll go from 91 billion tiles to 366 billion.
  md> This meaning you need 4 times the load to generate, 4 times the storage to
  md> hold them, 4 times the traffic to display them.

  I wonder if it would be sensible to switch to a vector-based rendering
  system for high zoom levels, as implemented at http://cartagen.org
  (using HTML5 canvas). This would allow "arbitrarily" high zoom levels.
  Tile-based rendering performs much better at low zoom levels, but I
  suspect that vector-based rendering would work better above z17.

-- 
Eric Marsden





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