[mkgmap-dev] Commit: r2013: Create and use "lies in" information in preprocessed bounds

Mon Aug 22 21:38:51 BST 2011

Just for your information:

To benefit from the changes you need to use bounds that are preprocessed 
by r2013 or later. I will do that within the next days and upload them 
to the navmaps page.

r2013 still can use the old preprocessed bounds because the format is 
the same.

WanMil

>
> Version 2013 was commited by wanmil on 2011-08-22 21:33:02 +0100 (Mon, 22 Aug 2011)
>
> Create and use "lies in" information in preprocessed bounds
>
> The "lies in" information of a preprocessed boundary defines in which other boundaries a given boundary is completely contained.
> Example:
> Boundary A10 (admin_level=10) lies in A8 (admin_level=8), A4 and A2.
> All elements in A10 are automatically in A8, A4 and A2. So the admin_levels 8, 4 and 2 are defined just be assigning the admin_level=10 boundary.
>
> This has two advantages:
> 1. Perfomance: Time for index creation with bounds option can be reduced by 25% max.
> 2. Bugfix: Boundary information was inconsistent for elements located in two boundaries of the same level, e.g. a street crossing a city border and a region border could have created one city assigned to both regions. Now a city assigned by the bounds locator should always have the same region and country.
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