[tz] Dropping coordinates from zone1970.tab?

[Guy Harris]

On Sep 30, 2021, at 12:51 AM, Aurelien Jarno via tz <tz at iana.org> wrote:

> The point is not about choosing a timezone from a location, but rather
> being able to show the cities linked to the timezones on a map so that
> end users can pickup their timezone visually.

"Cities linked to the timezones" as in "the cities whose names appear in the tzids of the regions", or as in "cities located within the regions"?

The latter sounds far more useful to users than the former, as that way the end user can look for the city nearest to them, *even if that city doesn't happen to be the one used in the tzid for their region*.  It would also let them type in the name of a city near them to specify the region they're in (as long as the city isn't both near them *and* in a different zone.)

> While timezones concept
> might sometimes be difficult to end users, they are usually aware if a
> city near to their location "has the same time or not".

"Has the same time" as what?  Presumably not the city whose name appears in the tzid of the region, as users shouldn't have to be aware of tzids.

> Note that all the information for providing nice ways to select a
> timezone for end-users is available in zone.tab,

zone.tab has the boundaries of tzdb regions as well as the names of sufficiently significant cities in each region?  I don't see the names of the two largest cities near me in that file, much less the name of the smaller city in which I live, so I don't see any way to construct a nice way to select a timezone from that data.