Pierre-André Jacquod a scris: > Hi, > > >>> I also see this as an error in the tagging-schema. >>> We have way too many values for "amenity" so these collisions >>> happen all the time. It`s not just bank+atm, it is also >>> hotel+restaurant and many others. >>> This way of tagging amenities simply grew without any regard >>> for what was technically possible (most editors never properly supported >>> multiple values for a key, thus noone was to use them as their work >>> could be destroyed at any moment). >>> >>> Marcus >> +1 >> >> We could restructure most (all?) amenities to more speaking k/v-pairs, >> by inventing thematic replacement-groups for amenity (and the similar >> man_made): > > I do not thing wee need to restructure it. > Here some stats taking into account Austria, Switzerland, Finnland and > Belgium: > amenity key has been used 40193 in nodes and 10346 in ways > Amenity as key has been used with 431 different value tags. > > among theses 431 different values, there are 25 values with ; in them, > all value (like fuel;fast_food or fuel;toilets ) being composed of > values already used normally alone as amenity.
The fact that they are not used in the present in the form "a;b" doesn't prove they wouldn't be used if it was established and recommended practice. Because such a recommendation doesn't exist alters people's behaviour. How much does that quantify to, I couldn't tell. > This is at least 6% of key/value paar showing that the mapper thing the > value belong to the same node... Actually this is more, since within the > 431 entries, I saw quite a lot of entries due to misspelling. Without > knowing all artificial double node (like I did) in order to map as it is > "taught".. > > > Amenity has been combined with 384 other keys... some of them like atm, > shop,... > > I found 638 times the combination > amenity = bank > atm = ..... > which shows that we are fare higher than 6% for the same point with > different values since except manually it is not possible to know that > the tag atm = yes means amenity = atm, but since this is already used > for bank, I do a workaround.... > > here below some details of my stat. I am now improving the performance > of my program and try to let it run on europe. My end goal is to be able > to create a kind of automatic dictionary of which key combination are > used, and with which values... As soon as it can be presented in a > better way, I will do it -- Regards, EddyP ============================================= "Imagination is more important than knowledge" A.Einstein
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