User:Krauss/stable.openstreetmap.org

(drafting a proposal)

Stable is a map for digital preservation, that preserves elements with an "stable or permanent" ID. It is a source of Permanent IDs and to download the last stable version of the map.
It is also an stable URL, http://stable.openstreetmap.org/{name_or_ID}, for the Permanent ID and name resolution.

Stable elements of the map

Elements with more tham 1 year, representating the same Map Feature, that not changed its central Geohash and not changed its definition-tags (main stable tags like type="boundary", type="route", etc. and a tag with key:wikidata).

Stable ID of a Map Feature

Any official ID (eg. all official Brazilian administrative boundary have an ID named IBGE-ID) or valid Wikidata ID value in its wikidata-key. It can be used in a stable URL to redirect to the URL of the element.

Stable names of a Map Feature

Tipically a official name (eg. prefixes of lex URNs of juristictions) or official abbreviation (eg. ISO 3166‑1 alpha‑2).

Demonstration

All, names and IDs demonstred here, are Persistent Place Identifiers. The testing URL-template is http://osm.qr-c.org/{name_or_ID}

Scope INT - International

Example http://osm.qr-c.org/2679759 , a two-country (Argentina and Brasil) bridge, the Fraternity Bridge.

Scope BR - Brazil

See map at http://osm.qr-c.org/BR or http://osm.qr-c.org/Q155

The ":" notation is for jurisdiction:authority, while the separators "-" or ";" are for jurisdiction hierarchy. Solves also the same codes with a URN LEX prefix, "urn:lex:".

Examples of name-resolution of official names and official-codes:

name_type	# of names	Examples and comments
abbrev	32	ISO 3166 subcodes of the BR code, like BR-AC, BR-AL,BR-AM,..., BR-SE, BR-SP, BR-RJ,... and regions like BR:N, BR:CE.
id-ibge	5597	All state or city numbers defined by the IBGE authority. BR-AM is br:ibge:13, BR-SP is br:ibge:35. City numbers: BR-AM-Manaus is br:ibge:1302603, BR-SP-Campinas is br:ibge:3509502.
lex-label	5597	The same above with optional lex prefix (eg. urn:lex:br;ac) and ";" hierarchy-separator. All city-names can be extense, with "." replacing spaces: br;am;manaus, BR-SP-Campinas is br;sp;campinas.

Examples of Gehash resolution

All IDs and names are transformed into a OSM element-pointer (<osm_type,osm_id>) and each element have its center, so there are a latitude/longitude coordinate and a Geohash representation for it. The OSM elements with Wikidata tag are few compared with all other ones, so, in general they are unique in the resolution table. When there are more tham one the interface shows a desambiguation page.

Some examples: ...

Examples of ID-resolution

All are Wikidara-IDs (wd_id) and are the "default namespace" of the URL, can be refered as "Q155" or "155".

wd_id to Wikidata	OSM type	Name	wd_id to Map
Q171617	relation	city of Campinas (SP)	http://osm.qr-c.org/Q171617
Q40040	relation	state of Amazonas	http://osm.qr-c.org/Q40040
Q1140639	way	Piracicaba river (born SP)	http://osm.qr-c.org/Q1140639
Q2739838	relation	federal BR-116 road	http://osm.qr-c.org/Q2739838
Q45225844	node	monument at São Paulo, Estátua do Borba Gato	http://osm.qr-c.org/Q45225844

There are already thousands of Wikidata references at OSM, following some statistics of the current distribution:

elememt type	# of Elements with wd_id	# of distinct wd_id's	% distincts
node	4168	4044	97
relation	6099	6025	99
way	1568	1110	71

osm_type	feature_type	n_direct	n_total	Directs
n		4166	4166	100%
r	boundary	5302	5331	99%
r	multipolygon	428	433	99%
r	route	167	186	90%
r	waterway	117	117	100%
r	public_transport	58	58	100%
r	route_master	17	17	100%
r	site	3	3	100%
w		1248	49375	3%
w	primary	119	10353	1%
w	trunk	94	2299	4%
w	waterway	28	62	45%
w	secondary	21	1810	1%
w	service	15	165	9%
w	tertiary	14	1441	1%
w	motorway	13	3900	0%
w	residential	12	643	2%
w	boundary	2	8	25%