Image:Dinosaur track.jpg

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Summary

This is propably Tyrannosaurus rex tracks.

The picture was taken from:

http://pdphoto.org/PictureDetail.php?mat=pdef&pg=5493

Licensing

pdphoto.org

Public domain

This image from PD Photo.org has been released into the public domain by its author and copyright holder, Jon Sullivan.

He stated: "You may use this image for any purpose, including commercial. As the owner I have explicitly placed it in the public domain. If you do use it, please consider linking back to pdphoto.org. Use it for whatever you want. Use it all. Sell it. Mangle it. Whatever you want. Please. But it would be polite to let me know so I can at least enjoy whatever creative use you're putting it to. This doesn't mean that you can take the material and then copyright it yourself. It's in the public domain and that's where I want it to stay."

U.S. quarter

This image has currency in it to indicate scale.

Avoid using objects such as coins for scale, as they will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins are particularly bad as they can reinforce a geographical bias, and some coins' designs are not free content.

Ideally, a photograph should include a ruler with the subject (as seen in this photo) or add a scale marking via an image editor instead (as seen in this photo). SI/metric units are the most commonly used worldwide (see metre, 1 E-2 m).

Examples of bad practice: here.

A tape measure


Common coin diameters for reference:

  • U.S. dollar:
  • Canadian dollar:
  • Pound sterling
  • Euro

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File history

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Date/Time Dimensions User Comment
current 11:46, 17 January 2006 1,024×768 (149 KB) Gang65 (This is propably Tyrannosaurus rex tracks. The picture was taken from: http://pdphoto.org/PictureDetail.php?mat=pdef&pg=5493 I don't know which licence I should check.)
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