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opengeospatial / Temporal-Abstract-Spec

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Use Cases to tie us to reality #2

Closed chris-little closed 8 months ago

chris-little commented 2 years ago

I suggest we record a wide range of use cases in this GitHub to drive the standardisation. We need a standard framework/form to structure the Use Cases. The framework may need to recognise there is a temporal and spatial component to the context of any clock.

This is valid for 'Regime 0' (no clocks, only events, as well as 'Regime 1' with clocks.

cmheazel commented 1 year ago

Calendars for residents of the Moon and Mars (the calendars will be very different from ours and there will be a need for transforms between them). Stardate (from Star Trek) - calendars where there is no planetary frame of reference. System time - time as an Engineering coordinate reference system. Minkowski spacetime - a 4D coordinate reference system used in subatomic physics, orbital mechanics, or anywhere where space and time are treated as a 4D space. Observed vs. Proper time - from Special Relativity

chris-little commented 1 year ago

Calendars for residents of the Moon and Mars (the calendars will be very different from ours and there will be a need for transforms between them).

Already in Section 6

chris-little commented 1 year ago

Stardate (from Star Trek) - calendars where there is no planetary frame of reference.

Why a calendar? Why not use a agreed atomic clock timescale? Startrek doesn't do special or general relativity. This is a bad use case.

chris-little commented 1 year ago

System time - time as an Engineering coordinate reference system.

This is addressed.

chris-little commented 1 year ago

Minkowski spacetime - a 4D coordinate reference system used in subatomic physics, orbital mechanics, or anywhere where space and time are treated as a 4D space. Observed vs. Proper time - from Special Relativity

There is a paragraph on this. Does it need more explanation?

chris-little commented 9 months ago

As part of the Request for Public Comment on the Abstract Conceptual Model for TIme, some concrete uses cases for the major concepts were added in an Annex to the specification.

chris-little commented 8 months ago

@cmheazel @ronaldtse I propose to close this issue as it is addressed adequately in the Abstract Conceptual Model for Time.

Other use case could focus on future work, such as best practices, registers of temporal CRSs, any detailed standards, and vocabularies. These should be separate issues, or even a separate repo and WG!