This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Redraw of pixel (png) image as vector (svg). The original can be viewed here: Eratosthenes' method for determining the size of the Earth.png: . Modifications made by Gregors.

This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties. العربية ∙ čeština ∙ Deutsch ∙ Zazaki ∙ English ∙ español ∙ eesti ∙ suomi ∙ français ∙ hrvatski ∙ magyar ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ português ∙ română ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ Tiếng Việt ∙ 简体中文 ∙ 繁體中文 ∙ +/−

This image is a derivative work of the following images:

• File:Eratosthenes'_method_for_determining_the_size_of_the_Earth.png licensed with PD-USGov-NOAA
  • 2011-01-14T10:07:47Z Gregors 667x929 (133526 Bytes) {{Information |Description={{en|taken from the public domain source Geodesy for the Layman at http://www.ngs.noaa.gov/PUBS_LIB/Geodesy4Layman/TR80003A.HTM#ZZ4 [[:en:Category:Images of Earth|Category:Images of Earth]]}} |Sour

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