Keywords: Snellius baseline r.png en Triangulation baseline between Leyden and Zoeterwoude The Netherlands figure from page 157 of Eratosthenes Batavus by W Snellius baseline tc highlighted in red 2013-09-02 23 07 14 Eratosthenes Batavus W Snellius derived from file Snellius baseline bw png Custom license marker 2013 09 02 Hans Erren Uploaded with UploadWizard Willebrord Snellius Triangulation |