Feature request: Global Sun Elevation Isolines
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The layer of Sun Elevation Isolines would help to interpret current temperatures in relation to the position of the sun in the sky.
In the link below I provide a picture with the example:
https://drive.google.com/file/d/1pf-VtOLIstrhQiZGxXO_c-VyFJQrKrF1/view?usp=sharing
The owner of the picture is www.jgiesen.deThanks for your attention.
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@torianus
At least an overlay (as option) showing the limit of night and day should be nice. As already requested by @MetallicPoison
https://community.windy.com/topic/6044/day-night-overlayIt would give an image looking to
https://www.star.nesdis.noaa.gov/GOES/GOES16_CONUS_Band.php?band=GEOCOLOR&length=48Of course adding isolines of sun elevation would be even better.
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@idefix37
There are some examples of real-time maps:
https://www.timeanddate.com/worldclock/sunearth.html?iso=20180706T1620
or
http://www.spacew.com/www/zenith.htmlBut I don't know what algorithms they use for drawing those contours.
I would use the Sun Position Algorithm and A General Algorithm For The Construction Of Contour Plots developed By NASA.
1.https://rredc.nrel.gov/solar/codesandalgorithms/spa/- http://www.pdas.com/conplot.html
Could be that some coordinate transformation applies to the result of the SPA algorithm before feeding it to the contour plotting.
Ciao guys
- http://www.pdas.com/conplot.html
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One more thing.
The equations in the SPA algorithm are of trigonometric nature, therefore it shouldn't be that hard to solve them when Elev.Angle=Const. Thus you get a contour function.Then after applying a coordinate transformation you end up with a compact mathematical function which subsequently can be expressed in the Javascript language.
