Charles, for a simple and effective measure see Wall Declination.pdf<http://www.precisionsundials.com/wall%20declination.pdf> and WallDeclination.exe<http://www.precisionsundials.com/walldeclination.exe>. I do not know how its accuracy compares to other methods, but it is an easy method to perform. -Bill Gottesman
On Sat, Sep 22, 2012 at 7:36 AM, Charles Beck <chforens...@gmail.com> wrote: > Hello all, > My first post here, another sundial enthusiast. > Doing my first sundial on a declining westerly wall. > Can you share your tips to measure the wall's declination as accurately as > possible? > From a sat image I measured 10 degrees tilt. > With the nail and board method I got 9.2 degrees as an average of a > morning and afternoon measurement. > Can I get more accurate? > regards > > Ch. > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > >
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
