Posted 17 February 2012 - 10:20 PM
As a land surveyor by day and astro-nut by night I found this article very interesting and the photos are good too. I would like to know more about it too, particularly how it was determined where to place it so as to be on the correct latitude. Nowadays with GPS so common that housewives use it to find grocery stores, latitude and longitude are taken for granted by many, but there determination is a real bit of a measuring trick without GPS. Latitude is not as difficult to get roughly but I would think since this monument seems to work so well more sophitiscated astronomical observations were used, rather than the simplest "drive a stick in the ground" method. Longitude is a different matter and I would encourage anyone interested in such matters and the history of how these determinations, so important in navigation, were developed to read the short but very good book "Longitude" by Dava Sobel.