[OSM-talk] All you've ever wanted to know about the french cadastre

Eric Marsden eric.marsden at free.fr
Thu Sep 27 20:50:57 BST 2012


>>>>> "sh" == Sarah Hoffmann <lonvia at denofr.de> writes:

  sh> Objects are real word objects here: highways, pois, boundaries etc.
  sh> In other words, for 7 imported buildings you manage to map one 
  sh> non-cadastre object. So indeed, I would agree that French
  sh> contributors do map other details. 
  sh> Occasionally. Very. Occasionally.

  This is an interesting point of view. How many buildings do you think
  there are on an average street in France? Fewer than for an average
  street in the USA, certainly, but likely more than 7. 
  
  sh> Whatever use all those balconies, patios and swimming pools might
  sh> have in the future, right now in the present the cadastre import
  sh> has become a major nuissance for anybody who wants to use OSM data.
  sh> It wastes lots of bandwidth and CPU time. If it wasn't for the
  sh> cadastre imports, we'd still be able to keep the 32bit id space
  sh> for nodes for another year or two, which would save a lot of hard
  sh> disk space for a lot of people.

  Amazingly, bandwidth and hard disk space per euro are increasing
  faster than these lazy French cadastre importers can pollute the
  database ... Which isn't to say that buildingless planet extracts
  might be useful to some people.

-- 
Eric Marsden




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