Re: Latitude / longitude distance and bearing.
- From: "David L. Wilson" <dwilson314@xxxxxxxxxxx>
- Date: Sat, 01 Sep 2007 13:56:07 GMT
"Dave (from the UK)" <see-my-signature@xxxxxxxxxxxxx> wrote in message
news:46d949f2@xxxxxxxxxxxxxxxx
I have two locations, call them 'a' and 'b' .
a) Altitude of a and b (call them alt_a and alt_b).
b) Latitude of b and b (call them lat_a and lat_b)
c) Longitude of a and b (call them long_a and long_b)
'a' and 'b' are fairly close together (10 - 20 km) and in line of sight
distance. (Two mountain peaks).
I want to find
1) The straight line distances from a to b. (*Not* the distance along the
circumference of the earth, which I can get from the Haversine formula)
2) The bearing of 'a' when viewed from 'b'.
3) The vertical angle - i.e how many degress above the horizon is 'a' when
viewed from 'b'. (alt_a > alt_b).
Take a look at INVERS3D/FORWRD3D at
http://www.ngs.noaa.gov/PC_PROD/Inv_Fwd/
There is also FORTRAN source code.
Also of interest is the porigram COMPSYS21 available at
http://www.naco.faa.gov/index.asp?xml=naco/online/compsys
.
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- From: Dave (from the UK)
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