این یک عکس دستکاری شده است به این معنی که به صورت دیجیتالی از نسخهٔ اصلی تغییر یافته‌است. تغییرها: Redraw of pixel (png) image as vector (svg). اصل آن را می‌توان در اینجا مشاهده کرد: Eratosthenes' method for determining the size of the Earth.png. تغییرها توسط Gregors انجام شده‌است.

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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