27 Aug
2009
27 Aug
'09
9:15 p.m.
On Thu, Aug 27, 2009 at 3:55 PM, DE<satan66613@yandex.ru> wrote:
is there a need for subj?
i implemented very accurate direct and inverse geodetic problem routines (as well as geocentric (X, Y, Z) to geodetic (B, L, H) conversion) i used bessel's method to derive the formulas 6 iterations for both direct and inverse routines is enough to converge to full double precision (16 digits) however the formulas themselves provide 9 significant digits that is 1cm accuracy regardless of range (i.e. range = 1m..20000km) to get acceptable accuracy, say, 2 iterations is enough (or even 1)
however there are several other aspects uncovered (area and perimeter, projections, etc.)
Do you have plans to support WGS84? What about Vincenty? --Michael Fawcett