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Re: Following a ridgeline [message #60890 is a reply to message #60884]

Tue, 17 June 2008 02:20

RJA
Messages: 2
Registered: May 2006

Junior Member

On 16 Jun, 20:24, "mzagu...@gmail.com" <mzagu...@gmail.com> wrote:
> Hi,
>
> I've got a 2d map (let's say it's a contour map of a mountain). I
> need to be able to 'detect' and 'follow' the ridgeline across the
> whole mountain (which does about a 180 degree turn as well, it's U
> shaped). Anyone know any way to accomplish this?
>
> So far, i've attempted to start at the maximum point, and then look
> for surrounding points that minimizes the downward slope, this
> process, however, creates switchbacks at peaks and doesnt follow the
> peak down along a ridge. Any ideas?
>
> Thanks!

Have you tried to find the medial axis? The thin() function calculates
this for you.

Cheers, Richard.

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[Message index]

		Re: Following a ridgeline By: Jelle on Wed, 18 June 2008 11:10
		Re: Following a ridgeline By: Jelle on Wed, 18 June 2008 11:02
		Re: Following a ridgeline By: Juggernaut on Wed, 18 June 2008 09:14
		Re: Following a ridgeline By: Jean H. on Wed, 18 June 2008 08:55
		Re: Following a ridgeline By: Jelle on Wed, 18 June 2008 01:52
		Re: Following a ridgeline By: Jean H. on Tue, 17 June 2008 10:14
		Re: Following a ridgeline By: RJA on Tue, 17 June 2008 02:20
		Re: Following a ridgeline By: Peter Clinch on Tue, 17 June 2008 02:01
		Re: Following a ridgeline By: Jelle on Mon, 16 June 2008 16:14
		Re: Following a ridgeline By: Kenneth P. Bowman on Mon, 16 June 2008 12:37
		Re: Following a ridgeline By: mzagursk@gmail.com on Mon, 16 June 2008 13:34
		Re: Following a ridgeline By: karo03de on Mon, 23 June 2008 00:50
		Re: Following a ridgeline By: mzagursk@gmail.com on Mon, 16 June 2008 13:15
		Re: Following a ridgeline By: David Fanning on Mon, 16 June 2008 12:49
		Re: Following a ridgeline By: Mike[2] on Tue, 24 June 2008 08:53

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