Show day and light world map on the Raspberry Pi

[sapnho]

I have searched the web but have found no documentation on how to get a Day and Night World Map like this one http://www.timeanddate.com/worldclock/sunearth.html on a Raspberry Pi.

So, what I would like to have is to have this up during the day and obviously changing it with the time, so not a static picture but a dynamic one.

Any guidance from the experts?

[tbd.pi]

You mean you want to serve this, or just access a map that looks like that on the pi? Creating one of those maps isn't a pi specific problem, although you will have to look at how you sync the clock on the pi (I've not needed to do that yet) as it doesn't have a RTC and wouldn't be accurate unless you set it.

[DougieLawson]

http://aa.usno.navy.mil/imagery/earth/m ... &minute=35
Works with UTC. You may be able to use that to generate the images for you, ready to use.

Or take a look at http://www.fourmilab.ch/homeplanet/ and see if you can port the Visual C code to the Raspberry Pi.

[Joe Schmoe]

apt-get install sunclock

Note: I've built this from source in the past, but now it is available "the easy way".

[W. H. Heydt]

You mean you want to serve this, or just access a map that looks like that on the pi? Creating one of those maps isn't a pi specific problem, although you will have to look at how you sync the clock on the pi (I've not needed to do that yet) as it doesn't have a RTC and wouldn't be accurate unless you set it.

The Pi defaults to setting its clock from NTP servers. On the whole, it probably keeps better time than your watch. It also adjusts between Standard Time and DST automatically (a feature I dearly love with the Pi I use as an alarm clock).

[B.Goode]

apt-get install sunclock

Note: I've built this from source in the past, but now it is available "the easy way".

+1

Don't look for anything else until you have tried this.


PS: you might need to persuade it to install by prefixing with 'sudo'

[sapnho]

Code: Select all

apt-get install sunclock

That is certainly a great app but ideally I would like to use genuine satellite pictures rather than graphics similar to what this guy has done https://www.youtube.com/watch?v=4M-C9WHew9w. I tried to contact him but he hasn't answered yet.

[B.Goode]

From man sunclock

The Sunclock
package includes a resizable and zoomable vector map . External Earth
maps can also be loaded (starting with version 3.51, formats .jpg,
.gif, .png, .xpm or .xpm.gz, .vmf can be read [.vmf is the specific
vector map format of sunclock]).

and

- File Selector window. It can be accessed by clicking on the upper
part of the main window with the middle mouse button. It allows one to
select the Earth image file (in formats *.vmf *.xpm, *.xpm.gz, *.jpg,
*.gif, *.png) to be loaded.

[sapnho]

Still too difficult to me without detailed instructions. I really wonder what Tim Cortini was using.

[sapnho]

That's the kind of image that would be ideal, just the dynamic photo: http://www.die.net/earth/

[davidcoton]

You seem to have found your own answer . Contact the guy at the web site to get his permission, then download the image to your RPi at regular intervals, as negotiated, and display it. It just depends how "real time" you want to get.

[sapnho]

Yep, I already contacted him, waiting for a response. It's updated every 30 min, that's near time enough for a world view.

[MagicJohansson]

Hello guys

A real newbie with Raspberry here but programming is what I have done all my life so this is a little embarrassing :-/

I am trying to compile the sunclock_3.57 that I have downloaded here : https://github.com/mdoege/Sunclock

The compile however stops with an error :

readvmf.c:353:7: error: request for member 'have' in something not a a struct or union
i=gzgetc(fd);
^

And the a whole list of the same error asking for different members.

I also get the following:
/usr/include/zlib.h:1391:21 note: expected 'gzFile' but argument is of type 'struct gzFile_s **'

What am I doing wrong here and what should I do ?
And before You tell me to install the compiled version using apt-get I need to modify the code for my needs

Thank You
Magic