HP 11C Cogo Program:


Years ago I had a program for the 11C that would take Lats & Longs and would calculate the Azimuth & distance between two points. It was only a 15 or 20 step program. You'd store the Lat & Long of point A into 1 & 3 register and the Lat & Long for point B into 2 & 4 register and run the program. It was Great for surveying in the field. Does anyone know of this program or something similar for the 11C?? If so, please email me at thebruce7@aol.com. Thanks.


Robert --

This is essentially the "Great Circle Course and Distance" program from the HP-41 Navigation Pac, which is not quite so compact -- 35 lines plus an input-processing subroutine.

It's not exactly what who wanted, but it could give you some ideas for Google searching...

-- KS


Hi Robert. For me, one of the benefits of reading postings to this forum is to learn new things as well as to help remember old things.

There is an algorithm on page 240 of John Ball's "Algorithms for RPN Calculators" that should help. The result of the example calculation agrees with the result from:


I hope that this helps.




Look here: http://homepage.mac.com/nwjh/HP-33S/
for program "Co-ordinate 'Inverse' 1: Azimuth and Distance from Co-ordinate".
It is for HP33S, but maybe you can use it.

Best Regards,

Possibly Related Threads…
Thread Author Replies Views Last Post
  HP Prime: run a program in another program Davi Ribeiro de Oliveira 6 2,697 11-11-2013, 08:28 PM
Last Post: Davi Ribeiro de Oliveira
  HP-11C "horse racing" version Peter Murphy (Livermore) 2 1,729 08-12-2013, 07:34 PM
Last Post: rpn fan
  HP-11C and complex numbers Antlab 5 2,200 06-28-2013, 08:59 AM
Last Post: Antlab
  HP 11C Batteries have lasted 22 years nink 3 1,445 06-23-2013, 06:51 PM
Last Post: Les Koller
  Creeping black pattern on HP-11C screen Larry Gagnon 6 2,091 04-12-2013, 10:09 AM
Last Post: Peter Murphy (Livermore)
  HP 11C/12C/15C/16C case Philippe Cairic 4 2,097 11-06-2012, 06:04 PM
Last Post: Matt Agajanian
  HP-11C Back Screws John Swisher 0 1,285 09-12-2012, 10:52 AM
Last Post: John Swisher
  1/2 HP-11C display Duane Hess 13 3,547 08-21-2012, 08:44 AM
Last Post: uhmgawa
  HP48 Cogo Card - Worth Anything? JamesT 4 1,584 08-21-2012, 02:46 AM
Last Post: Reth
  One owner HP 11c Ethan Conner 2 1,312 08-11-2012, 09:13 PM
Last Post: Fabricio

Forum Jump: