Some images, maps, and graphics used on this website are sourced from third-party creators and are used under various Creative Commons licenses. These licenses allow content to be reused under specific conditions, such as attribution, non-commercial use, or share-alike requirements.

Where required, we acknowledge and respect the original creators and the terms under which their work is shared. This page provides an overview of the types of licenses that may apply to third-party content used on this site.

Creative Commons Licenses (All Versions)

Creative Commons offers a range of standardized licenses that enable creators to share their work legally while retaining certain rights. Over time, multiple versions of these licenses have been released (from version 1.0 up to version 4.0). Some content used on this website may be licensed under any of these versions.

You can view the full overview of all Creative Commons licenses here.

These licenses may include, but are not limited to:

  • Attribution (CC BY) – Content may be reused with credit to the creator.
  • Attribution-ShareAlike (CC BY-SA) – Content may be reused with credit and must be shared under the same license.
  • Attribution-NonCommercial (CC BY-NC) – Content may be reused with credit for non-commercial purposes only.
  • Attribution-NoDerivatives (CC BY-ND) – Content may be reused with credit but cannot be modified.
  • Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) – Non-commercial reuse with credit and same-license sharing.
  • Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND) – The most restrictive license, allowing non-commercial reuse with credit and no modifications.

Different images on this site may fall under different Creative Commons terms depending on their original source.

Public Domain & CC0 Content

Some content may be released into the public domain or shared under the CC0 (Creative Commons Zero) dedication. This allows the content to be used freely without attribution.

More information about CC0 can be found here.

License Compliance & Attribution

We make reasonable efforts to comply with all applicable Creative Commons license terms. Attribution may be provided directly alongside content, within captions, or through this general licensing notice.

If you believe that any content on this site has been improperly credited or licensed, please contact us and we will review the issue promptly.

Additional Information

For more details on how Creative Commons licenses work, you can visit the official Creative Commons FAQ.