[OSM-dev] tag implication database/library

[Imre Samu]

>Is there some way of doing this just once; for example with some parseable
implication database, and library?
>...
>1. normalizing a database before usage, for example changing
>  "highway=ford" to "ford=yes" and moving to modern lifecycle tags

The iD Editor has some JSON metadata about this ..
see : https://github.com/openstreetmap/iD/blob/master/data/deprecated.json
example:

        {
            "old": { "highway": "ford" },
            "replace": {
                "ford": "yes"
            }
        },
        {
            "old": { "highway": "stile" },
            "replace": {
                "barrier": "stile"
            }
        },
        {
            "old": { "highway": "incline" },
            "replace": {
                "highway": "road",
                "incline": "up"
            }
        },

[  +  Wiki  deprecated list  :
https://wiki.openstreetmap.org/wiki/Deprecated_features  ]




And the iD Editor has a lot of presets metadata :

For example:   Homeless Shelter ===  amenity=social_facility  +
social_facility=shelter  +   social_facility:for=homeless
https://github.com/openstreetmap/iD/blob/master/data/presets/presets/amenity/social_facility/homeless_shelter.json

{
    "fields": [
        "operator",
        "address",
        "building_area",
        "opening_hours",
        "wheelchair",
        "social_facility_for",
        "internet_access",
        "internet_access/fee",
        "internet_access/ssid"
    ],
    "geometry": [
        "point",
        "area"
    ],
    "terms": [
        "houseless",
        "unhoused",
        "displaced"
    ],
    "tags": {
        "amenity": "social_facility",
        "social_facility": "shelter",
        "social_facility:for": "homeless"
    },
    "name": "Homeless Shelter"
}


Imho:
- The only problem, that they only accept general tags, for general mappers
.. ( see https://github.com/openstreetmap/iD/pull/3600 )


Probably the other editors has a similar metadata  ..


Best,
  Imre

2016-11-17 11:51 GMT+01:00 Per Eric Rosén <per at rosnix.net>:

> Hi!
>
> I have been making a few maps and applications using OSM data, mostly
> stored in postgis. In all cases, I have had to make custom carto rules /
> database post-processing / application rules to compensate for multiple
> ways of expressing the same information in OSM. Also, in some cases,
> for taking care of which tag implies which information.
>
>
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