====== Online panorama generator ======

It is possible to use an [[https://www.udeuschle.de/panoramas/makepanoramas.htm| online panorama generator]] to make an horizon file for CdC.

In the form set your coordinates, here an example for [[https://en.wikipedia.org/wiki/Annecy|Annecy]], France. \\
Be sure to set "Left edge=90", "Right edge=90", "Tilt=0", "Elev. exaggeration=1". 

{{:en:documentation:horizon1.png?500|}}

Show the panorama, use the function in your web browser to save the page in a new directory, be sure the option to save the complete web page is selected.

{{:en:documentation:horizon2.png?300|}}

This result in the following image files in the directory. You can delete the other files.

{{:en:documentation:horizon3.png?500|}}

Assemble this images in [[https://www.gimp.org|GIMP]] (a bit tedious) or using the simple "montage" command from [[https://imagemagick.org/|ImageMagick]].
<code>magick montage 20250820* -mode Concatenate  -tile x1 annecy.png</code>
 
This is the result, you can now follow [[observatory#use_an_horizon_picture|the instruction]] to generate an horizon file for CdC using this panorama.\\
The main operation is to make the sky area transparent.

{{:en:documentation:horizon4.png?600|}}