Daylight World Map

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Shows which parts of the world are in daylight, which are in twilight, and which are in darkness. The approximate positions of the sun and moon (projected on to the Earth) are also shown.

Various locations around the world can be selected, and the date and time can be changed. For the currently selected location and the current date and time, information such as the number of daylight hours and sunrise/sunset times are shown in an information panel.

The map can also be animated to show the passage of light and shadow across the surface of the Earth over time. The speed can be selected using the "Time Step" control.

The program makes some approximations; do not rely on the results to be totally accurate, they are intended as a guide only.

See Also:
Geek Calendar Tool - Show information on various calendar systems.
Geek Clock Tool - Show various clock systems.

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Recent Update

20 Aug 2016
Daylight World Map V2.62 released - Fixed last location restore bug.


Force close errors? The most common cause of the app crashing is the phone running out of memory, especially when zooming in. Some developments are planned to use memory more efficiently to help avoid this problem. In the meantime, if your phone has limited memory, try closing other apps, or is possible avoid zooming in too much!

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Recent comments

Moon Data Please add moon data like rise/set times, % full, az/el, lat/long. This is a great app!
posted 2016-05-27 by George Stein

widget display The most simple way to centre the widget image is to use the stored preferred location (lat DDD MM, long DDD MM) before searching. John.
posted 2016-05-25 by John

Map construction Your Moon is under the night shadow so that it appears to dim. REDRAW it to shine on top. DRAW a map centered on Sydney Australia. SPLITTING the map up the Atlantic Ocean shows Melanesia and Micronesia and Iceland as a whole. ALSO add a day/date/midnight short line on top of the night mask at the bottom of the map to show many terminations. John
posted 2016-05-24 by John
In the app itself, the map can of course centred on a specific location, or on the sun's position. This feature is not (yet) available on the widget however. Fair point about the moon during the night, it should be brighter.

Phone location A sensible person leaves the battery eating GPS turned off. So this app would be much better answering to a stored/preferred location.
posted 2016-05-24 by John
The app tries to get the location via any means available, including GPS and/or coarse location from the cell network. The app does also remember your currently selected location.

Midnight line A true midnight line in the Southern Ocean would be specifically there to ignore time zones for people who do tbings such as Navigation Surveying or Astronomy. Being in the Soutern Ocean means it would notpimpact anybody or time zones.
posted 2016-05-24 by John

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