docs: plate carree or equirectangular projection

Author: navispatial

README.md

@@ -9,6 +9,7 @@ Most media files contained in the repository are licensed under the [Creative Co
 Licensed under the [Creative Commons Attribution-Share Alike 3.0 Unported license](https://creativecommons.org/licenses/by-sa/3.0/deed.en):
 * SVG-files on the [assets/doc/data/features](assets/doc/data/features) folder by M. W. Toews ([Mwtoews](https://commons.wikimedia.org/wiki/User:Mwtoews)).
 * PNG-files on the [assets/doc/projections/azimutal](assets/doc/projections/azimutal) folder by Stefan Kühn (Fotograf).
+* JPEG-files on the [assets/doc/projections/platecarree](assets/doc/projections/platecarree) folder by [Daniel R. Strebe](https://commons.wikimedia.org/wiki/User:Strebe). 
 
 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).

assets/doc/projections/platecarree/1024px-Equirectangular_projection_SW.jpg

@@ -0,0 +1,37 @@
+# Equirectangular projection images
+
+From [Wikimedia Commons](https://commons.wikimedia.org/wiki/Main_Page), the free media repository.
+
+All JPEG-files on this folder are copyrighted and licensed as described below.
+
+## Files - author and descriptions
+
+The author and the copyright holder for all JPEG-files on this folder is 
+[Daniel R. Strebe](https://commons.wikimedia.org/wiki/User:Strebe). 
+
+Source data is created at 15 August 2011, downloaded at 17 June 2022 from 
+[Wikimedia Commons](https://commons.wikimedia.org/wiki/Main_Page).
+
+All JPEG-files on this folder are licensed under the 
+[Creative Commons Attribution-Share Alike 3.0 Unported license](https://creativecommons.org/licenses/by-sa/3.0/deed.en).
+
+JPEG-files on this folder:
+* [Equirectangular_projection_SW.jpg](https://commons.wikimedia.org/wiki/File:Equirectangular_projection_SW.jpg) (2058 × 1036)
+* [320px_Equirectangular_projection_SW.jpg](https://commons.wikimedia.org/wiki/File:Equirectangular_projection_SW.jpg) (320 × 161)
+* [640px_Equirectangular_projection_SW.jpg](https://commons.wikimedia.org/wiki/File:Equirectangular_projection_SW.jpg) (640 × 322)
+* [1024px_Equirectangular_projection_SW.jpg](https://commons.wikimedia.org/wiki/File:Equirectangular_projection_SW.jpg) (1024 × 515)
+* [1280px_Equirectangular_projection_SW.jpg](https://commons.wikimedia.org/wiki/File:Equirectangular_projection_SW.jpg) (1280 × 644)
+
+Links point to description pages on Wikimedia Commons.
+
+## License for JPEG-files on this folder
+
+Files are licensed under the [Creative Commons Attribution-Share Alike 3.0 Unported license](https://creativecommons.org/licenses/by-sa/3.0/deed.en).
+
+You are free:
+* **to share** – to copy, distribute and transmit the work
+* **to remix** – to adapt the work
+
+Under the following conditions:
+* **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 or compatible license as the original.