All my photos are licensed under CC-BY-SA-4.0 and can be used according to this license. Wherever you use my photos you must add at least the following Copyright:
CC-BY-SA-4.0 Markus Giger (commons.wikimedia.org)
You also find this in the exif data of my photos. If you find there CC-BY-SA-2.5-CH you are also allowed to use this 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.
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
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.
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.