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Re: intersection of two tracks(lat,lon) [message #75238 is a reply to message #75136]

Sun, 20 February 2011 23:59

Kai Muehlbauer
Messages: 13
Registered: February 2011

Junior Member

Hi all,

Am 17.02.2011 09:22, schrieb Kai Muehlbauer:
> Unfortunately, this is only for X,Y-space. What can I do, if the 3rd
> dimension (height) should also be processed?

my thanks to Guillermo and also Ken for sharing your ideas.

Actually I do (as Guillermo suggested) check the heights of the two
tracks at intersection point. This is sufficiently fast and suits fine.

Also Kens suggestion of a brute force solution finding the distances for
every pair of points is interesting. As I'am not an idl-expert I
appreciate some coding-help at this point. I found that I could use
DISTANCE_MEASURE, but it has only one array as input argument. So I have
to concatenate my two (x,y,z)-tracks and after processing extract the
interesting indices from the output array/matrix. Then I have to sort,
to find the shortest distance (or do some more sophisticated) and
possible local minima.

Cheers,
Kai

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[Message index]

		intersection of two tracks(lat,lon) By: Kai Muehlbauer on Wed, 16 February 2011 00:59
		Re: intersection of two tracks(lat,lon) By: Kenneth P. Bowman on Thu, 17 February 2011 07:11
		Re: intersection of two tracks(lat,lon) By: guillermo.castilla.ca on Thu, 17 February 2011 07:02
		Re: intersection of two tracks(lat,lon) By: Kai Muehlbauer on Thu, 17 February 2011 00:22
		Re: intersection of two tracks(lat,lon) By: Kai Muehlbauer on Sun, 20 February 2011 23:59
		Re: intersection of two tracks(lat,lon) By: kisCA on Wed, 16 February 2011 12:39
		Re: intersection of two tracks(lat,lon) By: Kai Muehlbauer on Mon, 21 February 2011 22:51
		Re: intersection of two tracks(lat,lon) By: guillermo.castilla.ca on Mon, 21 February 2011 06:05

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