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 ∙ +/−

Original upload log

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

Uploaded with derivativeFX