Hello Friends
It's been a long, long time since I last disturbed you with my novice
questions.
I was just acculating credits do be entitled to ask the following
question
that has more to do with navigation than any other thing:
a) If I am using UTM coordenates, what is the easiest way to calculate
the bearing from point A to point B in the chart;
b) Same questions if am using latitude and longitude
When using UTM I have come accross a solution that works but I must
confess I hate it because I don't think it is elegant and it takes a lot
of
time so I am sure there must be a better solution.
For the UTM it is much simpler because I can always create a Pythagorean
triangule whose sides are the difference of Northing and Easting of the
points,
so I have three sides and an angle. Now, if I make the origin point the
origen
of a Cartesian system I can find the Azimuth adding together the angle I
found
plus 0, 90, 180 or 270 if the destination point is on the first, second,
third or
fourth quadrant.
I does work, but there must be a simpler way to do it.
If what I have are the geographic coordinates it takes me much more time
with the spherical triangles and I am never sure I've done the right
thing.
I've read some books on celestial navigation and position astronomy. I
can see
the solution is there, but it does not seem I have the expertise to
convert all those
useful information in a simple formula for this specific calculation.
And I feel very unhappy when I have to fill out a couple of pages with
ugly
calculations just to find out an azimuth I can easily find with a GPS or
with
a protactor and a map!
Best regards
- fernando
--
Fernando Cabral Padrao iX Sistemas Abertos
mailto:[EMAIL PROTECTED] http://www.pix.com.br
Fone Direto: +55 61 329-0206 mailto:[EMAIL PROTECTED]
PABX: +55 61 329-0202 Fax: +55 61 326-3082
15º 45' 04.9" S 47º 49' 58.6" W
19º 37' 57.0" S 45º 17' 13.6" W
