All my photos are licensed under CC-BY-SA-4.0 and can be used according to this license. When you use my photos outside Wikipedia you must add at least the following Copyright:

• CC-BY-SA-4.0 Markus Giger (commons.wikimedia.org)

You also find this copyright info in the exif data of my photos. If you find there CC-BY-SA-2.5-CH you are also allowed to use this older license. But I allow also for these photos to use the CC-BY-SA-4.0 license. For further questions you can reach me under my username, written as guerbetaler, (at) yahoo.fr.

I, the copyright holder of this work, hereby publish it under the following license:

This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.

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.

https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue