Editing 1335: Now
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
| Latest revision | Your text | ||
| Line 14: | Line 14: | ||
The picture rotates by 3.75 {{w|degree (angle)|degrees}} every 15 minutes, as does the Earth so that it is constantly up to date in showing which regions are currently at which times of day. The picture change seems to happen halfway through a 15-minute time increment (that is, at 7½, 22½, 37½, and 52½ minutes after each hour), so that the picture is always correct for the nearest multiple of 15 minutes. | The picture rotates by 3.75 {{w|degree (angle)|degrees}} every 15 minutes, as does the Earth so that it is constantly up to date in showing which regions are currently at which times of day. The picture change seems to happen halfway through a 15-minute time increment (that is, at 7½, 22½, 37½, and 52½ minutes after each hour), so that the picture is always correct for the nearest multiple of 15 minutes. | ||
| − | The map projection of the earth in the middle of the picture shows an {{w|azimuthal equidistant projection}} with the {{w|South Pole}} in the center. This is unusual, as such projections {{w|Flag of the United Nations|typically}} put the {{w|North Pole}} in the center | + | The map projection of the earth in the middle of the picture shows an {{w|azimuthal equidistant projection}} with the {{w|South Pole}} in the center. This is unusual, as such projections {{w|Flag of the United Nations|typically}} put the {{w|North Pole}} in the center, but may be necessary (in this case) for the rotation (''and'', perhaps more importantly, the corresponding {{w|24-hour analog dial|24-hour clock}} graduations) to be the usual clockwise. Another reason might be just to depict all major land-masses (including {{w|Time in Antarctica|complicated Antarctica}}, which is not otherwise referenced) in a non-discontinuous manner. [[Randall]] was playing on projections before in [[977: Map Projections]]. |
The list of cities and countries doesn't match the map exactly - notice how the continent of Australia is shifted counterclockwise of the words "most Australian cities". This is because the map is centered relative to the {{w|time zone}}s and the local variations. The map shows the configuration of time zones concerning {{w|daylight saving time}} (also known as summer time) at the time of the comic's initial release (February 2014); it was being observed in parts of Australia, New Zealand, Brazil, and other countries not named in this comic. If the map were to stay accurate through the year, the location of place names would have to move over the next few months as parts of the southern hemisphere went off DST and parts of the northern hemisphere went onto it; however, the map failed to change on the morning of March 9 as it should have (to recognize the start of DST in North America). | The list of cities and countries doesn't match the map exactly - notice how the continent of Australia is shifted counterclockwise of the words "most Australian cities". This is because the map is centered relative to the {{w|time zone}}s and the local variations. The map shows the configuration of time zones concerning {{w|daylight saving time}} (also known as summer time) at the time of the comic's initial release (February 2014); it was being observed in parts of Australia, New Zealand, Brazil, and other countries not named in this comic. If the map were to stay accurate through the year, the location of place names would have to move over the next few months as parts of the southern hemisphere went off DST and parts of the northern hemisphere went onto it; however, the map failed to change on the morning of March 9 as it should have (to recognize the start of DST in North America). | ||
