Wikidata:Property proposal/offset from vertical

offset from vertical

Originally proposed at Wikidata:Property proposal/Generic

   Done: offset from vertical (P8398) (Talk and documentation)

Description	distance from a vertical line at a given height, e.g. overhang in metres of a leaning tower at its top
Data type	Quantity
Domain	use as qualifier for angle from vertical (P4183) to indicate the overhang of a leaning tower, notably when a reference/source indicates only a distance: value of P4183 can be set to "unknown" if the height at which this measured is known, qualify with height (P2048) (top of the tower?) if P4183 is calculated from this, add a determination method (P459)-qualifier to indicate how
Allowed units	metre (Q11573), etc.
Example 1	Leaning Tower of Niles (Q6509808) → 7.4 ft [1]
Example 2	Q17374068 → 1.15 m [2]
Example 3	tower of Temple Church (Q96053753) → 1.64 m [3]
Example 4	Leaning Tower of Toruń (Q2234463) → 1.5 m [4]
Example 5	Oude Kerk (Q612065) → 1.96 m [5]
Example 6	Martinitoren (Q1897266) → 0.6 m [6]
Example 7	Asinelli tower (Q16511590) → 2.23 m [7]
Example 8	Tower in Ząbkowice Śląskie (Q2234461) → 1.5 m [8]
Example 9	Church of Santa Eugènia de Nerellà (Q11682889) → 1.4 m [9]
Example 10	Trumpeter's tower (Q96098821) → 2.3 m [10]
Example 11	Campanile of Santo Stefano (Q96097455) → 2.0 m [11]
Planned use	add to some of https://w.wiki/Sqc
See also	angle from vertical (P4183): angle the principal axis of an item makes with the vertical; use degree (Q28390) as unit height (P2048): vertical length of an entity

Motivation

For some towers this is given in both angle and offset from vertical, for others just one is available. While one can be converted to the other, this isn't necessarily reliable. This property would allow to record the actual value when given as offset. Ideally this should be qualified with height. Please help complete the proposal (Add your motivation for this property here.)

@Mike Peel, ArthurPSmith, Ita140188, DePiep, Mahir256: as you participated in the discussion at Wikidata:Property proposal/angle. --- Jura 13:24, 4 June 2020 (UTC)

Discussion

•  Comment Doesn't this property need something extra, like "offset of top [at 114 m]"? And, it does not look independent (not orthogonal) re "Wikidata:Property proposal/angle". How should we treat properties in this? -DePiep (talk) 18:26, 4 June 2020 (UTC)
  • I thought that it should be qualified with height (P2048). This can be at the top or some point below the spire. --- Jura 19:07, 4 June 2020 (UTC)
  • @DePiep: maybe using this as qualifier for angle from vertical (P4183) could work. I added an explanation above. Ok for you? --- Jura 16:00, 10 June 2020 (UTC)
    • @Jura1: I am not that familiar with Properties on WD. I cannot judge what would work & be correct Prop usage. (Maybe redefine as "max offset"? -- would implicitly solve it for most situations, i.e., the top) -DePiep (talk) 18:30, 10 June 2020 (UTC)
      • @DePiep: I think it should work out as above. I'd rather not use "max. offset", because that isn't necessarily indicated in the samples above even though it's generally implied. --- Jura 18:33, 10 June 2020 (UTC)
        • OK then. -DePiep (talk) 18:41, 10 June 2020 (UTC)
        • @DePiep: can we count this as  Support ? --- Jura 17:01, 11 June 2020 (UTC)

 Support so yes. DePiep (talk) 17:06, 11 June 2020 (UTC)

@Jura1, DePiep: property created