Permanent ID: Unterschied zwischen den Versionen

Aktuelle Version vom 19. Juni 2019, 22:04 Uhr

Weiterleitung nach:

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-This is an '''unofficial proposal for a "permanent ID"'''.
+#REDIRECT [[Permanent_ID_for_OSM]]
-See https://wiki.openstreetmap.org/wiki/Permanent_ID for a more official state of discussions.
-The goal is to get an opaque fixed length ASCII string. And that are the design considerations:
-* The OSM id alone is not stable enough (as probably most agree; see (*)); and it can represent many concepts (and that's by design in OSM).
-* The version no. of the object is needed which makes clear which tags are (or have been) referred to.
-* Coordinates are needed, because a change of the geometry does not increment the version number.
-So a stable Permanent-ID could have the following form (which leads to a fixed length string of 34 chars):
-  [N|W|R]<osm_id>#<version>[+|-]<lon>[+|-]<lat>
-where:
-* osm_id is left-padded with zeros to get 10 chars ("digits"),
-* version is 4 zero-padded digits
-* coordinates have 5 fixed decimal places (lat is 2 and lon is 3 decimal places, both signed and left-padded with zeros).
-Example: "Schloss Kyburg" (Castle Kyburg) has relation 1169711,
-version #5 at coordinates 47.4584, 8.74343 which becomes following
-Permanent-ID:
-  R0001169711#0005+47.45840+008.74343