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Re: Calculation of intersection on map [message #71667]

Wed, 14 July 2010 06:49

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article
<780593a9-2c5b-44fe-9905-d3a06c89c436@i18g2000pro.googlegroups.com>,
bjkuk <bjkuk12@gmail.com> wrote:

> Dear All,
> I am looking for pre-made routine or proramming tips to get
> intersection. I would like to calculate intersection from given two
> positions(A and B)
>
> If we know Latitude and Longitude of Point-A and Point-B, also the
> azimuth angles of Point-A and Point-B from the North. if azimuth
> angles is not parellel, those two lines will be cross. How do I
> calcuate this intersection point (cross point) precisely?
>
> Sincerely Yours
> B.J.Kuk

Have a look at "Intersection of two paths given start points
and bearings" on this page

http://www.movable-type.co.uk/scripts/latlong.html

BTW, the bearing lines always intersect,even if the azimuth
angles are the same. A proper bearing line follows a great
circle. On a sphere, great circles either are
the same circle, or they intersect at two antipodal points.

Ken Bowman

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[Message index]

		Re: Calculation of intersection on map By: Kenneth P. Bowman on Wed, 14 July 2010 06:49
		Re: Calculation of Intersection on Map By: Bruce Bowler on Wed, 14 July 2010 05:01
		Re: Calculation of Intersection on Map By: bjkuk on Wed, 14 July 2010 16:15
		Re: Calculation of intersection on map By: bjkuk on Wed, 14 July 2010 16:14

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