Hi Rafael, On Fri, Nov 21, 2014 at 3:51 PM, Rafael Avila Coya <[email protected]> wrote:
> Hi, Andrea: > > Thank you for your dedication to this interesting address data import. > > I have opened the already merged osm file [1]. > > I think the quality of the data is really good in general in what > respects to the location of the nodes, although some of them seem to lie > over the road they belong too [2]. I don't see that a big concern, as > they are quite rare, and moreover this could be due to a not well > aligned Bing imagery. > In Italy we tend to use PCN aerial images not Bing because they are usually better aligned: https://wiki.openstreetmap.org/wiki/WikiProject_Italy/PCN Anyway I agree that that particular node is not well aligned. > But what I see a serious concern is the big number of groups of > addresses of the kind 4, 4a, 4b, 4c... > > Let's see, as an example, this image in Via Giovanni Crestani: [3] > > There we can see one building with the addr:housenumber=4 on it, but > then a row of 17 addr:housenumber that range from 4a up to 4t, that are > surrounding the house, some of them stretching quite far from it, nearer > to the house 6 and 19 than to the 4. > > The same happens with numbers 6, 17, 19, 21 and 30 in this example only. > Moreover, node number 8 doesn't exist in the group of 9 nodes that go > from 8a up to 8i. > > My opinion is that these nodes should be replaced by only one. In the > case of the groups of 4, 6, 17, 21 and 30 I would ignore (not import) > all the nodes with letter, so keeping only the node addr:housenumber=4 , > 6, etc., and in the cases like the 8, I would create a new > addr:housenumber=8 as the centroid of the nodes 8a, 8b... 8i. > > This is a quick idea, but there may be smarter ones to deal with this. > > What do you think? > I think it is plain wrong to delete subordinates. In most of Italy, and in Biella, a housenumber is not associated to a building. It is associated to an entrance (building entrances, gates, garages, etc). A housenumber can also have a subordinate (the letters you see). A user is expected to search for a housenumber like "36d" and not for "36" which can be 2 km down the road. https://wiki.openstreetmap.org/wiki/Import/Catalogue/Address_import_for_Biella#Address_format_in_Biella Bye, Andrea
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