[OSM-dev] Slippy map way forward -- OpenLayers and/or Mapstraction?

[Lars Aronsson]

Nick Whitelegg wrote:

> Now we've got the new renderer up it seems a good point to ask 
> the question about how to take the slippy map forward, to 
> support annotations and the like.

I would be interested in some statistics: How many tiles are 
generated each day?  Is there any log from where we can count 
this?  Does the Squid give us statistics on the hit/miss ratio?
How many tiles are generated for the edit applet and how many for 
the general viewer?  How many at each zoom level?  How many for 
each part of the world?  How many for each hour of the day?
Sometimes tiles are generated without the satellite image 
background, and sometimes without the roads.  How many times do 
these exceptions occur?

I think a simple log like this would be useful:

  2006-06-30 15:48:11 view 58.3468415 12.3101 11 134 ok

That is: date, time, kind of tile (view, edit), latitude, 
longitude, zoom, milliseconds elapsed during tile generation, 
exceptions (or ok).

Do we generate a log file like that today?  Could this be 
introduced?  In my experience, appending a line of text to a log 
file is always affordable in time and space.


-- 
  Lars Aronsson (lars at aronsson.se)
  Aronsson Datateknik - http://aronsson.se