Image attribution - contributor guidelines

Title-Author-Source-License embedded in image filename (filenaming convention)

In most third party images used on this site, the image attribution is included in the filename of the image in an abbreviated form. Additional source information for images can be found in the Media Attributions page on this site.

The filename of an image can be easily seen by right-clicking on an image after installing a Chrome Browser extension like View Image Info, and additionally for background images the extension View background image.

Here is an example of an image filename used on this site:

The image file uses the following File Format:

  • TITLE_description_size_mods_AUTHOR_SOURCE_LICENSE
  • orig-title_personal-description_width999xheight555px_compression-percent_author-name_source-site_licence-abbr.fileextension

Each section is separated by an underscore, multiple words are separated by dashes. German umlauts, capitalisation and special characters have been avoided.  (Charset uses only: a-z, 0-9, hyphen and underscore) This ensures, that the fileneame is easy readable in the browser and usable on any web server.


  • orig-title

If the image image has an original title, it is included here.

Personal Description:

  • personal-description

Alternative personal description of the image. An image without an original title should have a meaningful description. If the original title is not very clear, we add our own description here.


  • width999xheight555px 2500x1200px 

Size of the image when it was uploaded to the server, with width x height in pixels. The Squarespace server creates various resolution images from the uploaded image. Currently: 100 px, 300 px, 500 px, 750 px, 1000 px, 1500 px and 2500 px. Most images should be resized & compressed before upload to 2500 pixels at about 65% jpeg quality to reach a maximum file size of 200 - 500 kilobytes. Images or illustrations, especially transparent png's which are never stretched to full page width should be fine at around 750px


  • orig (unchanged original photo)
  • comp-XX (where XX is the percentage jpeg compression in Photoshop)
  • res (if it was resized & the resolution was changed)
  • crop (if it was cropped)
  • mod (for other modifications, if allowed by the license)

Changes made to the photo, such as saturating, desaturating, and resizing all need to be mentioned.


  • author-fullname  

The author of an image is the individual who owns the rights to it. Sometimes, the author may be more than one individual, or it may be a company. If the image has no other license attached, 'Copyright © All rights reserved' is assumed. The word 'copyright' may be used in front of the name, while leaving out the license abbreviation at the end. Example:



  • source-site source

The name of the source site, for example wikimedi, pixabay, getty-images where the original image exists. For smaller, less known sites we use the format company-com or orgnatization-org


  • licence-abbr

The abbreviation of the license name, if applicable. Different photos will have different restrictions. Licenses are meant to describe these restrictions, and will tell you how photos can and can’t be used. This naming convention is loosely based on:

Images in editorial context

For Images used in an editorial context, we use a credit line such as the following: (The Text inside brackets is italicised.). Individual photos are credited in the caption. 


GettyImages (licensed through Squarespace) 
  • (Photo: [Photographers Name] | [GettyImages or iStock])
  • (Photo: [username] | [Instagram])
Individual photographers:
  • (Photo: [Photographers Name] |

Multiple Images in a gallery

For multiple images from the same photographer posted in a gallery or slideshow, we use a credit line below the gallery or at the bottom of the gallery page. The Text is italicised.

Individual photographer:
  • Photos by: [Photographers Name] |