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Re: How to plot shaded relief image [message #58009 is a reply to message #57830]

Wed, 09 January 2008 12:28

JMB
Messages: 13
Registered: January 2008

Junior Member

Hi all,

I have to correct my precedent post.
The "kind of shading matrix" I introduced before is NOT the shading
given by a source of light incident on the DEM,
It is a directional gradient of the DEM. High positive values
correspond to high slopes in uphill direction, low negative values
correspond to high slopes in downhill direction, zero values
correspond to flat areas. The 3x3 matrix operator defines the
direction of the gradient of interest.

I will try to give in a few days a better algorithm to compute shading
on a dem from an incident light defined by a 3D vector.

Cheers,

Jerome

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[Message index]

		How to plot shaded relief image By: Dave[4] on Fri, 04 January 2008 03:03
		Re: How to plot shaded relief image By: Dave[4] on Fri, 04 January 2008 11:29
		Re: How to plot shaded relief image By: JMB on Thu, 10 January 2008 03:56
		Re: How to plot shaded relief image By: JMB on Wed, 09 January 2008 12:28

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