Зображення:Dinosaur track.jpg

Матеріал з Вікіпедії — вільної енциклопедії.

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[edit] Summary

This is propably Tyrannosaurus rex tracks.

The picture was taken from:

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

[edit] Licensing

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
A tape measure
This image has a coin in it to indicate scale.

Do not rely solely on coins or other "common" objects for scale, as it will require people unfamiliar with it to look up its dimensions or guess, both of which defeat the purpose of the coin in the first place.

Please photograph an object such as a ruler or add a scale marking in via an image editor instead. Standard units such as SI/metric units should be used (See metre, 1 E-2 m).

Examples of good practice: with superimposed line.
Examples of bad practice: here.


Common coin diameters for reference:

  • U.S. and Canada:
    • 1¢: 19 mm, 0.75 in;
    • 5¢: 20 mm, 0.79 in;
    • 10¢: 18 mm, 0.71 in;
    • 25¢: 24 mm, 0.95 in;
    • 50¢: 30 mm, 1.18 in;
    • $1: 26 mm, 1.02 in;
    • $2: 28 mm, 1.10 in.
  • UK
    • 1p: 20.32 mm, 0.80 in;
    • 2p: 25.91 mm, 1.02 in;
    • 5p: 18.00 mm, 0.71 in;
    • 10p: 24.50 mm, 0.96 in;
    • 20p: 21.40 mm, 0.84 in;
    • 50p: 27.30 mm, 1.07 in;
    • £1: 22.50 mm, 0.89 in;
    • £2: 28.40 mm, 1.12 in.
  • Eur
    • 1¢: 16.25 mm,
    • 2¢: 18.75 mm,
    • 5¢: 21.25 mm,
    • 10¢: 19.75 mm,
    • 20¢: 22.25 mm,
    • 50¢: 24.25 mm,
    • 1€: 23.25 mm,
    • 2€: 25.75 mm,

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