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Re: Moon Image ??

Posted: Mon 11 Jun 2012 3:38 pm
by RayProudfoot
steve wrote:Here's another link, one you might consider "more authoritative". According to the web site of the US Naval Observatory (my emphasis): "The percent of the Moon's surface illuminated is a more refined, quantitative description of the Moon's appearance than is the phase. Considering the Moon as a circular disk, the ratio of the area illuminated by direct sunlight to its total area is the fraction of the Moon's surface illuminated; multiplied by 100, it is the percent illuminated. At New Moon the percent illuminated is 0; at First and Last Quarters it is 50%; and at Full Moon it is 100%. During the crescent phases the percent illuminated is between 0 and 50% and during gibbous phases it is between 50% and 100%."

If you'd like to give me a definitive reference for the mapping of percentage visibility to lunar phase, I can consider changing Cumulus at some point.
Steve, I completely agree with that source. Reading it, it also say's this... "The two crescent and two gibbous phases are intermediate phases, each of which lasts for about a week between the primary phases, during which time the exact fraction of the Moon's disk that is illuminated gradually changes."

What I do find difficult to get my head around is that 49% of the moon illuminated represents a crescent rather than still a quarter. If you accept that a full moon can still look full one day either side of it being full there's a reasonable case to be made for + and - 1 day either side of first / last quarter.

It's open to interpretation and not a huge issue for me nor you I suspect. I'm currently trialling the alternative from the site I mentioned earlier so people can compare the phases should anyone want to do it.

Re: Moon Image ??

Posted: Mon 11 Jun 2012 8:20 pm
by RayProudfoot
This is a useful demonstration. http://astro.unl.edu/naap/lps/animations/lps.swf

New Moon is 1.1% or less of the surface illuminated.
Waxing / Waning Crescent is between 1.2% and 45.6% illuminated.
First / Last Quarter is between 45.7% and 54.4% illuminated.
Waxing / Waning Gibbous is between 54.5% and 98.8% illuminated.
Full is 98.9% or more illuminated.

So first / last quarter will be visible for less than gibbous phases but perhaps for 2 days compared to the current 1.

Re: Moon Image ??

Posted: Tue 12 Jun 2012 2:06 am
by GraemeT
....it's all gotten too academic for me....


Mapantz,
I can't claim any credit at all for the images...they're someone else's and sadly, I can't remember where they came from. :(
If I could, I'd post more details.

Re: Moon Image ??

Posted: Fri 15 Jun 2012 11:08 pm
by GraemeT
Oops! :oops:
Previous post incorrect - now fixed...

The source of the moon images is actually here: https://cumulus.hosiene.co.uk/viewtopic.php?f=18&t=352
Scroll down to the final post for the d/l. link.

Re: Moon Image ??

Posted: Sat 23 Jun 2012 12:33 am
by GraemeT
I've reworked my moonphase code and (hopefully) we can now show a different image for each day of the moon-cycle.
Here are the images, as well as a bit of php code to display them.
http://weather.gktnet.com/public/weathe ... hases2.zip

Cheers.

Re: Moon Image ??

Posted: Sat 23 Jun 2012 3:50 pm
by Mapantz
GraemeT wrote:I've reworked my moonphase code and (hopefully) we can now show a different image for each day of the moon-cycle.
Here are the images, as well as a bit of php code to display them.
http://weather.gktnet.com/public/weathe ... hases2.zip

Cheers.
Hi Graeme, I'd like to use the new way on my site, but i'm not clued up on what to do with php, so i wondered if you could guide me through it?

Regards.

PS: Good work!

Re: Moon Image ??

Posted: Sun 24 Jun 2012 12:24 am
by GraemeT
Hi Mapantz,

If you're not using php, it can be done in javascript.

My javascript is very rudimentary, but this should work for you:

Code: Select all

<script type="text/javascript">
var Lat="<#latitude>";
var hemi=Lat.substr(0,1);
var imagen = "<#MoonAge>";
if (hemi=="S") imagen = (-imagen)+29;
document.write('<img src="/images/moon2/'+imagen+'.png"/>');
</script>
View here: http://weather.gktnet.com/cumulus/index.htm
I've updated http://weather.gktnet.com/public/weathe ... hases2.zip to include this code.

Re: Moon Image ??

Posted: Sun 24 Jun 2012 3:06 pm
by Mapantz
GraemeT wrote:Hi Mapantz,

If you're not using php, it can be done in javascript.

My javascript is very rudimentary, but this should work for you:

Code: Select all

<script type="text/javascript">
var Lat="<#latitude>";
var hemi=Lat.substr(0,1);
var imagen = "<#MoonAge>";
if (hemi=="S") imagen = (-imagen)+29;
document.write('<img src="/images/moon2/'+imagen+'.png"/>');
</script>
View here: http://weather.gktnet.com/cumulus/index.htm
I've updated http://weather.gktnet.com/public/weathe ... hases2.zip to include this code.
Excellent! Thank you Graeme. :D

Re: Moon Image ??

Posted: Sun 24 Jun 2012 3:11 pm
by Paul-G0HWC
Got it working here too

Good work Graeme :clap:

Paul

Re: Moon Image ??

Posted: Sun 24 Jun 2012 3:30 pm
by Paul-G0HWC
I think its funny the time we spend doing tweaks to our weather pages
that 99% of visitirs will never notice ! But all part of the fun

:o

Paul

Re: Moon Image ??

Posted: Sun 24 Jun 2012 3:52 pm
by Mapantz
Paul-G0HWC wrote:I think its funny the time we spend doing tweaks to our weather pages
that 99% of visitirs will never notice ! But all part of the fun

:o

Paul
haha - yeah i'm always tweaking. As long as i'm happy with it, then i know most of the visitors will be.

Re: Moon Image ??

Posted: Sun 20 Jan 2013 2:35 pm
by Phlerb
Thanks for doing this. I really like these moon images.

The only thing I would mention in the text file is that the path of the imagefile may need to be changed to the include the subfolder that Cumulus is running under. I spent about an hour trying to determine why the image did not show.

I have my site running under .../Weather/index.htm, so I had to add /Weather to the code

document.write('<img src="Weather/images/moon2/'+imagen+'.png" alt="No Image" title="Moon is

Re: Moon Image ??

Posted: Thu 25 Jan 2018 3:34 pm
by gcaboz
How can i acess at this ?
http://weather.gktnet.com/public/weathe ... Phases.zip
Beacause it asks for a login name and password