[OSM-talk] Geofabrik Download Server Update

Frederik Ramm frederik at remote.org
Tue May 3 19:45:09 BST 2011


Matthias,

Matthias Julius wrote:
> But, I need to point out again that theese extracts are not quite as
> useful as they could be, IMHO. Unless something has been changed,
> ways that cross the bounding polygon are trunkated at the last node
> inside the polygon.

I have started to slowly introduce extracts built with the 
--complete-ways option, but not all extracts have that yet. In Europe, 
all sub-country extracts have it but countries don't, so you should be 
able to join two German Laender or two French regions, but you will 
encounter problems when joining a part of Germany with a part of France. 
I'm working on that but even a box with 90 GB of RAM disk has a hard 
time splitting Europe into countries with --complete-ways.

Note that two other preconditions exist for a successful join of 
neighbouring regions. First, the polygons I use for cutting must 
actually overlap. They usually do but every now and then I encounter a 
little bit of no man's land due to polygon simplification. Second, you 
have to use software that properly eliminates the double elements; I'm 
not sure if Osmosis does that.

Bye
Frederik

-- 
Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"



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