Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Fabio nonvedolora]

Hi all, as last step, according with Stefano Maggiolo, I applied the time-zone 
map to a truncated icosahedron (fullerene) as already done with the paper 
sundial n. 41 of Sundial Atlas. I just activate the paper sundial n. 45 with 
this map.
May be curious to watch the analemmas overprinted on the time zones.
www.sundialatlas.eu/atlas.php?app=45


ciao Fabio

PS remember to save the pdf on your computer, then to print it with the pdf 
reader to get the best result.

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)---
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RE: How wrong is your time zone: Map shows how far world clocks are from solar time

[Gent, R.H. van (Rob)]

Hi Fabio,

Thanks for the detailed explanation.

I have downloaded the G.Projector software and found ReprojectImage at 

  http://www.fracterra.com/ReprojectImage.zip

Thanks again for your help.

Rob

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Fabio 
nonvedolora
Sent: donderdag 29 oktober 2015 19:43
To: sundial list
Subject: Re: How wrong is your time zone: Map shows how far world clocks are 
from solar time

hi Rob
 
I did 2 steps:
 
- I added a white band at the bottom to rebuild the whole Miller projection.
I placed side by side a Miller map (from wikipedia) with the time-zone map, 
aligning them at the top. Then I vertical resized the time-zone map, from the 
bottom, to get the corrispondence of the continents on the same horizontal 
lines. I used Corel Draw for this action.
 
- I have a sw to convert an equirectangular map to many other kind of 
projections, may be you know G projector 
(http://www.giss.nasa.gov/tools/gprojector/).
This sw doesn’t allow the back conversion so I found ReprojectImage 1.0 to do 
this action, I don’t remember the website but it is free and if you wish I can 
send it to you or anyone who is interested (793 KB).
 
ciao Fabio
 
Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)
 
From: Gent, R.H. van (Rob) 
Sent: Thursday, October 29, 2015 2:52 PM
To: sundial list 
Subject: RE: How wrong is your time zone: Map shows how far world clocks are 
from solar time
 
Hi,
 
What kind of software did you use for converting the Miller cylindrical 
projection into an equirectangular projection? 
 
I would like to do similar things with other maps.
 
Rob van Gent
 
Utrecht, The Netherlands
---
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Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Fabio nonvedolora]

I wrote to Stefano Maggiolo the author of the map, he answered his map is a 
Miller,  moreover it hasn’t the southern polar band, so I added the missing 
southern band, then I converted it in an equirectangular map to get the right 
3D globe.

ciao Fabio

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)

From: Michael Ossipoff 
Sent: Sunday, October 25, 2015 5:38 PM
To: Fabio nonvedolora ; sundial list 
Subject: Re: How wrong is your time zone: Map shows how far world clocks are 
from solar time

Minor correction to what I just posted:


The Aitoff projection isn't equal-area (but it's nearly so).


Aitoff, was introduced in the late 1880s. Hammer was introduced just a few 
years later. Hammer acknowledged that his map is just an equal-area version 
using Aitoff's construction-principle, and Hammer's projection is often called 
"Hammer-Aitoff".


Hammer and Aitoff arguably look more realistic than Mollweide and Apianus II, 
but Hammer and Aitoff aren't cylindroid.  Hammer has only the equal-area 
property, and Aitoff doen't have a property.


Incidentally, Mollweide was introduced in 1805, by a teacher in Germany, and 
has been very popular.


Michael Ossipoff---
https://lists.uni-koeln.de/mailman/listinfo/sundial

RE: How wrong is your time zone: Map shows how far world clocks are from solar time

[Gent, R.H. van (Rob)]

Hi,

What kind of software did you use for converting the Miller cylindrical 
projection into an equirectangular projection?

I would like to do similar things with other maps.

Rob van Gent

Utrecht, The Netherlands

From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Fabio 
nonvedolora
Sent: donderdag 29 oktober 2015 12:54
To: sundial list
Subject: Re: How wrong is your time zone: Map shows how far world clocks are 
from solar time

I wrote to Stefano Maggiolo the author of the map, he answered his map is a 
Miller,  moreover it hasn’t the southern polar band, so I added the missing 
southern band, then I converted it in an equirectangular map to get the right 
3D globe.
[globe-Europe-400]
ciao Fabio

Fabio Savian
fabio.sav...@nonvedolora.it<mailto:fabio.sav...@nonvedolora.it>
www.nonvedolora.eu<http://www.nonvedolora.eu>
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)

From: Michael Ossipoff<mailto:email9648...@gmail.com>
Sent: Sunday, October 25, 2015 5:38 PM
To: Fabio nonvedolora<mailto:fabio.sav...@nonvedolora.it> ; sundial 
list<mailto:sundial@uni-koeln.de>
Subject: Re: How wrong is your time zone: Map shows how far world clocks are 
from solar time

Minor correction to what I just posted:
The Aitoff projection isn't equal-area (but it's nearly so).
Aitoff, was introduced in the late 1880s. Hammer was introduced just a few 
years later. Hammer acknowledged that his map is just an equal-area version 
using Aitoff's construction-principle, and Hammer's projection is often called 
"Hammer-Aitoff".
Hammer and Aitoff arguably look more realistic than Mollweide and Apianus II, 
but Hammer and Aitoff aren't cylindroid.  Hammer has only the equal-area 
property, and Aitoff doen't have a property.
Incidentally, Mollweide was introduced in 1805, by a teacher in Germany, and 
has been very popular.
Michael Ossipoff
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Fabio nonvedolora]

hi Rob

I did 2 steps:

- I added a white band at the bottom to rebuild the whole Miller projection.
I placed side by side a Miller map (from wikipedia) with the time-zone map, 
aligning them at the top. Then I vertical resized the time-zone map, from the 
bottom, to get the corrispondence of the continents on the same horizontal 
lines. I used Corel Draw for this action.

- I have a sw to convert an equirectangular map to many other kind of 
projections, may be you know G projector 
(http://www.giss.nasa.gov/tools/gprojector/).
This sw doesn’t allow the back conversion so I found ReprojectImage 1.0 to do 
this action, I don’t remember the website but it is free and if you wish I can 
send it to you or anyone who is interested (793 KB).

ciao Fabio

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)

From: Gent, R.H. van (Rob) 
Sent: Thursday, October 29, 2015 2:52 PM
To: sundial list 
Subject: RE: How wrong is your time zone: Map shows how far world clocks are 
from solar time

Hi,

 

What kind of software did you use for converting the Miller cylindrical 
projection into an equirectangular projection? 

 

I would like to do similar things with other maps.

 

Rob van Gent

 

Utrecht, The Netherlands
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Dan-George Uza]

Here is the updated version from February 2015.

http://blog.poormansmath.net/the-time-it-takes-to-change-the-time/

Dan Uza
Pe 25.10.2015 03:10, "Donald Christensen"  a
scris:

> I love that time zone map! does anyone know where I can download the jpeg
> file?
>
>
> Cheers
> Donald Christensen
> 0423 102 090
> www.fotoresumes.com   
>
>
>
> This e-mail is privileged and confidential. If you are not the intended
> recipient please delete the message and notify the sender. Un-authorized
> use of this email is subject to penalty of law.
> So there!
>
>
>
> On Sun, Oct 25, 2015 at 9:22 AM, Steve Lelievre <
> steve.lelievre.can...@gmail.com> wrote:
>
>> On 24/10/2015 15:22, Dan-George Uza wrote:
>>
>>>
>>>
>>> http://www.slate.com/blogs/the_world_/2014/02/21/how_wrong_is_your_time_zone_map_shows_how_far_ahead_or_behind_the_world.html
>>>
>>> Are you aware of any territories following official solar time?
>>>
>>>
>>>
>> Interesting question for which I do not know a definite answer, but I
>> guess it would depend on how wide the territory is. If true solar time was
>> used, then the West of the territory is going to run a different time to
>> the East. Perhaps you could standardise country wide by using, uh, a time
>> zone centred on your capital city. Greenwich to Trafalgar Square isn't very
>> far so can we treat the UK as using a timezone based on noon in its
>> capital? Not during Daylight Savings, though. As well, from the map you
>> cited, Guyana look like it's fairly well centred to its natural noon.
>>
>> For genuine local solar time, I'd like to think that there are indiginous
>> peoples left in some parts of the world who don't need to live by the
>> clock, rising with the dawn and bedding down with dusk.
>>
>> Steve
>>
>> ---
>> https://lists.uni-koeln.de/mailman/listinfo/sundial
>>
>>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Fabio nonvedolora]

hi, I applied the same map on the globe.


ciao Fabio

PS on request I can send other views with more pixels

Fabio Savian
fabio.sav...@nonvedolora.it
www.nonvedolora.eu
Paderno Dugnano, Milano, Italy
45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Michael Ossipoff]

Here is the comment (with a few clarifications added)  that I posted to
Stefano's article:


Stefano—


I like the idea of that smart-clock dawn-based time. In the Roman and
medieval world, “dawn” referred to the beginning of Civil Twilight, not to
Sunrise, and that’s what I’d suggest.


But I don’t think it’s necessary or desirable to go back to the old
“Temporary Hours” that divided the sunrise to sunset period into 12 equal
hours. Maybe start the day at Dawn, and use the current hour-length.


While “Dawn” is the fully-arrived beginning of Civil Twilight, “Aurora” in
Roman and medieval times, referred to the *beginning* of the arrival of
Dawn. Whereas Civil Twilight conventionally begins when the Sun is 6
degrees below the horizontal, Aurora is when the Sun is about 9.37 degrees
below the horizontal.


I don’t notice any advantage of Swatch-Time over GMT (UTC).


About your map-projection advocacy:


Robinson’s looks good, for a non-elliptical map. But compare it to the
elliptical maps, Hammer, Aitoff, Mollweide and Apianus II. The 1st 3 of
those are equal-area, and even Apianus II gives more accurate areas than
Robinson.


The ellipticals have a more realistic and accurate globular shape than
Robinson. Their pole is accurately a point rather than a line. Their
meridians accurately converge at that point.


What, exactly, is Robinson’s advantage over the ellipticals?


Robinson's popularity is largely a matter of current fashion.


Robinson has one property: It’s pseudocylindrical. Better put, it’s
*cylindroid*. A map is cylindroid if it’s cylindrical or pseudocylindrical.


(A map is cylindroid if its parallels are straight horizontal parallel
lines, each uniformly divided (uniform scale) along its length.)


Why settle for just that one property?? Mollweide and Apianus II are
cylindroid too. But Mollweide is equal-area, and Apianus II is linear (Y
co-ordinate is linear with latitude and X co-ordinate is linear with
longitude).


There are many equal-area cylindroid maps. There is a variety of linear
cylindroid maps, including Apianus II, Eckert III, and Cylindrical
Equidistant.


So there’s no need to settle for Robinson’s having only the cylindroid
property. Why not have equal-area or linearity as well?  …and combined with
globular realism.


But yes, as you said, a cylindrical map is more convenient for what you
were doing.


As for that website you linked to, with the line-drawings and comments
about a few map projections, the author of that didn’t even mention any
elliptical projections. And, basically, he was just expressing his
allegiance to current fashion.




Michael Ossipoff

On Sat, Oct 24, 2015 at 6:22 PM, Dan-George Uza 
wrote:

>
> http://www.slate.com/blogs/the_world_/2014/02/21/how_wrong_is_your_time_zone_map_shows_how_far_ahead_or_behind_the_world.html
>
> Are you aware of any territories following official solar time?
>
> Dan Uza
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Michael Ossipoff]

Minor correction to what I just posted:

The Aitoff projection *isn'*t equal-area (but it's nearly so).

Aitoff, was introduced in the late 1880s. Hammer was introduced just a few
years later. Hammer acknowledged that his map is just an equal-area version
using Aitoff's construction-principle, and Hammer's projection is often
called "Hammer-Aitoff".

Hammer and Aitoff arguably look more realistic than Mollweide and Apianus
II, but Hammer and Aitoff aren't cylindroid.  Hammer has only the
equal-area property, and Aitoff doen't have a property.

Incidentally, Mollweide was introduced in 1805, by a teacher in Germany,
and has been very popular.

Michael Ossipoff

On Sun, Oct 25, 2015 at 4:44 AM, Fabio nonvedolora <
fabio.sav...@nonvedolora.it> wrote:

> hi, I applied the same map on the globe.
> [image: globe-Europe-400]
>
> ciao Fabio
>
> PS on request I can send other views with more pixels
>
> Fabio Savian
> fabio.sav...@nonvedolora.it
> www.nonvedolora.eu
> Paderno Dugnano, Milano, Italy
> 45° 34' 10'' N, 9° 10' 9'' E, GMT+1 (DST +2)
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Donald Christensen]

I love that time zone map! does anyone know where I can download the jpeg
file?


Cheers
Donald Christensen
0423 102 090
www.fotoresumes.com   



This e-mail is privileged and confidential. If you are not the intended
recipient please delete the message and notify the sender. Un-authorized
use of this email is subject to penalty of law.
So there!



On Sun, Oct 25, 2015 at 9:22 AM, Steve Lelievre <
steve.lelievre.can...@gmail.com> wrote:

> On 24/10/2015 15:22, Dan-George Uza wrote:
>
>>
>>
>> http://www.slate.com/blogs/the_world_/2014/02/21/how_wrong_is_your_time_zone_map_shows_how_far_ahead_or_behind_the_world.html
>>
>> Are you aware of any territories following official solar time?
>>
>>
>>
> Interesting question for which I do not know a definite answer, but I
> guess it would depend on how wide the territory is. If true solar time was
> used, then the West of the territory is going to run a different time to
> the East. Perhaps you could standardise country wide by using, uh, a time
> zone centred on your capital city. Greenwich to Trafalgar Square isn't very
> far so can we treat the UK as using a timezone based on noon in its
> capital? Not during Daylight Savings, though. As well, from the map you
> cited, Guyana look like it's fairly well centred to its natural noon.
>
> For genuine local solar time, I'd like to think that there are indiginous
> peoples left in some parts of the world who don't need to live by the
> clock, rising with the dawn and bedding down with dusk.
>
> Steve
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
---
https://lists.uni-koeln.de/mailman/listinfo/sundial

Re: How wrong is your time zone: Map shows how far world clocks are from solar time

[Steve Lelievre]

On 24/10/2015 15:22, Dan-George Uza wrote:


http://www.slate.com/blogs/the_world_/2014/02/21/how_wrong_is_your_time_zone_map_shows_how_far_ahead_or_behind_the_world.html

Are you aware of any territories following official solar time?




Interesting question for which I do not know a definite answer, but I 
guess it would depend on how wide the territory is. If true solar time 
was used, then the West of the territory is going to run a different 
time to the East. Perhaps you could standardise country wide by using, 
uh, a time zone centred on your capital city. Greenwich to Trafalgar 
Square isn't very far so can we treat the UK as using a timezone based 
on noon in its capital? Not during Daylight Savings, though. As well, 
from the map you cited, Guyana look like it's fairly well centred to its 
natural noon.


For genuine local solar time, I'd like to think that there are 
indiginous peoples left in some parts of the world who don't need to 
live by the clock, rising with the dawn and bedding down with dusk.


Steve

---
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