On 31 August 2010 11:36, Serge Wroclawski <[email protected]> wrote: > As so often happens in OSM, a small mystery turns into a big question, > so here's mine for the week: > > If you don't want the explanation, just skip down to the part where it > says "THE QUESTION". > > I live in a place called Silver Spring, Maryland. > > It's not prominently displayed on the map: http://osm.org/go/ZZcfj5yN- > > Yet Takoma Park, which is much smaller, does. > > It turns out the reason is that the node for this town is: > http://nominatim.openstreetmap.org/details.php?place_id=437409 > > And has the tag hamlet. Silver Spring is not a hamlet. It has about > 80,000 people living in it according to > http://en.wikipedia.org/wiki/Silver_Spring,_Maryland > > My initial thought was "Well we should change the point", but then I > discovered this relation: > http://www.openstreetmap.org/browse/relation/133501 > > Which seems better (it still says that SS is a locality, which is > essentially the same as a hamlet/village, but it at least has the > administrative boundaries). > > THE QUESTION > > Do I fix the node? Do I copy the tags from the node into this relation > and then fix the relation? > > Why was the node the thing that came up in nominatim searches, and not > the relation? > > If I remove this node, will bad things happen? >
In theory, nothing wrong will happen if you delete the point. The place value should be probably changed in both cases. In terms of rendering, Mapnik will create a center of gravity point for the polygon. Essentially you will end up with two names displayed on the map. In France, we keep the two systems, a point and a relation for marking a town. The main reason is that the point can be used to reflect what the proper center of the town is. I don't think Nominatim rates locality very high compared to an hamlet. I can tell you that at work, we are ignoring place=locality for our reverse geocoding. Emilie Laffray
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