docs: rhumb line vs great circle

Author: navispatial

README.md

@@ -14,6 +14,7 @@ Licensed under the [Creative Commons Attribution-Share Alike 3.0 Unported licens
 Licensed under the [Creative Commons Attribution-Share Alike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/deed.en):
 * PNG-files on the [assets/doc/projections/webmercator](assets/doc/projections/webmercator) folder by [TheCrazyWhovian](https://commons.wikimedia.org/wiki/User:TheCrazyWhovian).
 * PNG-files on the [assets/doc/coordinates/cartesian](assets/doc/coordinates/cartesian) folder by *Sommacal alfonso*.
+* PNG-files on the [assets/doc/geodesy/rhumb_line_vs_great_circle/](assets/doc/geodesy/rhumb_line_vs_great_circle/) folder by *Jacob Rus*.
 
 Licensed under the [CC0 1.0 Universal Public Domain Dedication](https://creativecommons.org/publicdomain/zero/1.0/deed.en):
 * SVG-files on the [assets/doc/coordinates/geographic](assets/doc/coordinates/geographic) folder by Djexplo.

assets/doc/geodesy/rhumb_line_vs_great_circle/197px_Rhumb_line_vs_great-circle_arc.png

@@ -0,0 +1,39 @@
+# Rhumb line vs great circle images
+
+From [Wikimedia Commons](https://commons.wikimedia.org/wiki/Main_Page), the free media repository.
+
+All PNG-files on this folder are copyrighted and licensed as described below.
+
+## Files - author and descriptions
+
+The author and the copyright holder for all PNG-files on this folder is 
+[Jacob Rus](https://commons.wikimedia.org/wiki/User:Jacobolus).
+
+All PNG-files on this folder are licensed under the 
+[Creative Commons Attribution-Share Alike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/deed.en).
+
+PNG-files on this folder:
+* [Rhumb_line_vs_great-circle_arc.png](https://en.wikipedia.org/wiki/File:Rhumb_line_vs_great-circle_arc.png) (1854 × 2254)
+* [842px_Rhumb_line_vs_great-circle_arc.png](https://en.wikipedia.org/wiki/File:Rhumb_line_vs_great-circle_arc.png) (842 × 1024)
+* [632px_Rhumb_line_vs_great-circle_arc.png](https://en.wikipedia.org/wiki/File:Rhumb_line_vs_great-circle_arc.png) (632 × 768)
+* [395px_Rhumb_line_vs_great-circle_arc.png](https://en.wikipedia.org/wiki/File:Rhumb_line_vs_great-circle_arc.png) (395 × 480)
+* [197px_Rhumb_line_vs_great-circle_arc.png](https://en.wikipedia.org/wiki/File:Rhumb_line_vs_great-circle_arc.png) (197 × 240)
+
+Links point to description pages on Wikimedia Commons.
+
+## License for PNG-files on this folder
+
+Files are licensed under the [Creative Commons Attribution-Share Alike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/deed.en).
+
+You are free to:
+* **share** – copy and redistribute the material in any medium or format
+* **adapt** – remix, transform, and build upon the material
+for any purpose, even commercially
+
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+* **attribution** – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
+* **share alike** – If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
+
+No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.