[OSM-talk] shp-to-osm 0.7

Frederik Ramm frederik at remote.org
Wed Nov 4 14:39:22 GMT 2009


Ian,

Ian Dees wrote:
>     Why that? I think that having tags on the outer way is a legacy
>     thing; when I create new multipolygons, I leave the outer way
>     untagged and put the tags on the relation only.
> 
>     This becomes especially important if the outer ring consist of
>     multiple ways.
> 
> 
> Initially I had implemented it so that the tags go on the 
> type=multipolygon relation (and this almost always worked with JOSM and 
> Mapnik), but then I re-read the Relation:multipolygon wiki page [0] and 
> saw that the first section of the page says "tags describing the 
> multipolygon should go on the outer way."

What's most embarrassing is that I wrote that recommendation 18 months 
ago and it has never been changed. Until a few minutes ago ;-)

It's really not a big deal at the moment but my motivation to recommend 
tagging the relation is mainly because of

(1) consistency - if you have more than one outer way you must tag the 
relation, so why not do it if you only have one, too.

(2) future proof - I'm thinking of the multipolygon relation as the 
nucleus of a future area data type, thus it makes sense for me to tag 
the multipolygon (the area) and not its building blocks.

Entirely my opinion of course.

Bye
Frederik




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