[Talk-us] [Warning: Potential Flamewar] Clarifying InterstateRelations

[Anthony]

On Wed, Mar 10, 2010 at 11:17 AM, Jeffrey Ollie <jeff at ocjtech.us> wrote:

> On Wed, Mar 10, 2010 at 9:47 AM, Apollinaris Schoell <aschoell at gmail.com>
> wrote:
> >
> > but a us highway can't have an y node with lat/lon in another country.
> > this has been said many times here. we have boundary polygons and this is
> 100% defined where a road is. in older times is_in tags have been used as a
> cheap way to add such info but this is deprecated. the beauty of osm is the
> freeform tagging. there is absolutely no need to pack in all info in a
> single tag. if for any reason the US should be included use another tag and
> leave the network just with the correct value.
>
> The problem with using boundary relations is that you may be operating
> on extracts that don't contain the boundary relations that you need to
> determine which country you are in.
>

So either 1) the entire extract is within a single country (possibly with
some enclaves for which you have data); or 2) you can download all the
boundary relations which intersect the extract.

Am I missing how that's a big problem?
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