First Day Cover
首日封
Sobrescrito de 1.º Dia
LatviaStruve Geodetic Arc
Date of Issue : 5 May 2011
The Struve Geodetic Arc is a chain of survey triangulations stretching from Hammerfest in Norway to the Black Sea, through ten countries and over 2,820 km, which yielded the first accurate measurement of a meridian.
The chain was established and used by the German-born Russian scientist Friedrich Georg Wilhelm von Struve in the years 1816 to 1855 to establish the exact size and shape of the earth. The Arc's first point is located in Tartu Observatory, where Struve conducted much of his research.
The Latvia Struve Geodetic Arc are in the region of Jekabpils, and the region of Madona. The point in Jekabpils town resides on the left bank side of river Daugava in the park named after Struve. The Struve Geodetic Arc point is marked by cross on a small grounded concrete post. A memorial stone is erected at the site.
In Latvia, there are 16 of 265 points of Struve arc, and 2 of them are included in the UNESCO World Heritage.
A very nice FDC from Latvia. I just like the miniature sheet. Thank You very much to my friend !
Very nice!
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